diff --git a/assets/images/thumbnails/2023HMSBenVisness.png b/assets/images/thumbnails/2023HMSBenVisness.png
index 70a19db..164b2b3 100644
Binary files a/assets/images/thumbnails/2023HMSBenVisness.png and b/assets/images/thumbnails/2023HMSBenVisness.png differ
diff --git a/content/english/media/seattle-2023/approaching-local-first-software.md b/content/english/media/seattle-2023/approaching-local-first-software.md
index 5a17569..43fea63 100644
--- a/content/english/media/seattle-2023/approaching-local-first-software.md
+++ b/content/english/media/seattle-2023/approaching-local-first-software.md
@@ -4,7 +4,7 @@ mediatype="podcast"
 conference="seattle-2023"
 date="2023-11-15T12:00:00-08:00"
 description="Allen Webster sits down with the head of Ink & Switch, an independent research lab."
-thumbnail="/images/image-placeholder-16x9.png"
+thumbnail="/images/thumbnails/2023HMSLocalFirst.png"
 
 [[videos]]
 title="Approaching Local-First Software"
diff --git a/content/english/media/seattle-2023/cactus-image-viewer.md b/content/english/media/seattle-2023/cactus-image-viewer.md
index 11fab39..b92ebb4 100644
--- a/content/english/media/seattle-2023/cactus-image-viewer.md
+++ b/content/english/media/seattle-2023/cactus-image-viewer.md
@@ -4,7 +4,7 @@ mediatype="demo"
 conference="seattle-2023"
 date="2023-11-15T15:00:00-08:00"
 description="Lightweight image viewer for Windows."
-thumbnail="/images/image-placeholder-16x9.png"
+thumbnail="/images/thumbnails/2023HMSCactus.png"
 
 [[videos]]
 title="Cactus Image Viewer"
diff --git a/content/english/media/seattle-2023/dantes-cowboy.md b/content/english/media/seattle-2023/dantes-cowboy.md
index f493d2f..3d0cf94 100644
--- a/content/english/media/seattle-2023/dantes-cowboy.md
+++ b/content/english/media/seattle-2023/dantes-cowboy.md
@@ -4,7 +4,7 @@ mediatype="demo"
 conference="seattle-2023"
 date="2023-11-15T17:20:00-08:00"
 description="A Neo-Western town is simmering with conflict."
-thumbnail="/images/image-placeholder-16x9.png"
+thumbnail="/images/thumbnails/2023HMSCowboy.png"
 
 [[videos]]
 title="Dante's Cowboy"
diff --git a/content/english/media/seattle-2023/disassembling-impostor-syndrome.md b/content/english/media/seattle-2023/disassembling-impostor-syndrome.md
index 6a05136..1d7b795 100644
--- a/content/english/media/seattle-2023/disassembling-impostor-syndrome.md
+++ b/content/english/media/seattle-2023/disassembling-impostor-syndrome.md
@@ -4,7 +4,7 @@ mediatype="talk"
 conference="seattle-2023"
 date="2023-11-16T17:20:00-08:00"
 description="Understand the mechanisms behind how we see ourselves (and others) in communities that focus on building competence."
-thumbnail="/images/image-placeholder-16x9.png"
+thumbnail="/images/thumbnails/2023HMSLoris.png"
 
 [[videos]]
 title="Disassembling Impostor Syndrome"
diff --git a/content/english/media/seattle-2023/disk-voyager.md b/content/english/media/seattle-2023/disk-voyager.md
index 65ef105..dfbae7e 100644
--- a/content/english/media/seattle-2023/disk-voyager.md
+++ b/content/english/media/seattle-2023/disk-voyager.md
@@ -4,7 +4,7 @@ mediatype="demo"
 conference="seattle-2023"
 date="2023-11-16T15:00:00-08:00"
 description="Unleash the thrill of warp-speed file discovery!"
-thumbnail="/images/image-placeholder-16x9.png"
+thumbnail="/images/thumbnails/2023HMSDiskVoyager.png"
 
 [[videos]]
 title="Disk Voyager"
diff --git a/content/english/media/seattle-2023/embers-of-insight.md b/content/english/media/seattle-2023/embers-of-insight.md
index 236505c..fd0abaa 100644
--- a/content/english/media/seattle-2023/embers-of-insight.md
+++ b/content/english/media/seattle-2023/embers-of-insight.md
@@ -4,7 +4,7 @@ mediatype="chat"
 conference="seattle-2023"
 date="2023-11-15T10:00:00-08:00"
 description="Fireside wisdom with Bill Hall of JangaFX (Makers of EmberGen)"
-thumbnail="/images/image-placeholder-16x9.png"
+thumbnail="/images/thumbnails/2023HMSGingerBill.png"
 
 [[videos]]
 title="Embers of Insight"
diff --git a/content/english/media/seattle-2023/eon.md b/content/english/media/seattle-2023/eon.md
index 7b2cab1..a5d5313 100644
--- a/content/english/media/seattle-2023/eon.md
+++ b/content/english/media/seattle-2023/eon.md
@@ -4,7 +4,7 @@ mediatype="chat"
 conference="seattle-2023"
 date="2023-11-15T11:00:00-08:00"
 description="What can we learn from demo groups trying to coax 40yo hardware into doing things its designers never imagined?"
-thumbnail="/images/image-placeholder-16x9.png"
+thumbnail="/images/thumbnails/2023HMSEon.png"
 
 [[videos]]
 title="Eon: An Amiga 500 Demo"
diff --git a/content/english/media/seattle-2023/handmade-reflections.md b/content/english/media/seattle-2023/handmade-reflections.md
index 57084e1..6a1f127 100644
--- a/content/english/media/seattle-2023/handmade-reflections.md
+++ b/content/english/media/seattle-2023/handmade-reflections.md
@@ -4,7 +4,7 @@ mediatype="podcast"
 conference="seattle-2023"
 date="2023-11-16T12:00:00-08:00"
 description="Abner Coimbre and Ben Visness discuss Handmade's goals for 2024, with fun shenanigans along the way!"
-thumbnail="/images/image-placeholder-16x9.png"
+thumbnail="/images/thumbnails/2023HMSReflections.png"
 
 [[videos]]
 title="Handmade Reflections"
diff --git a/content/english/media/seattle-2023/mobilecode.md b/content/english/media/seattle-2023/mobilecode.md
index 5df556a..5fb1183 100644
--- a/content/english/media/seattle-2023/mobilecode.md
+++ b/content/english/media/seattle-2023/mobilecode.md
@@ -4,7 +4,7 @@ mediatype="demo"
 conference="seattle-2023"
 date="2023-11-15T15:20:00-08:00"
 description="A Handmade code editor designed for mobile phones."
-thumbnail="/images/image-placeholder-16x9.png"
+thumbnail="/images/thumbnails/2023HMSMobileCode.png"
 
 [[videos]]
 title="MobileCode"
diff --git a/content/english/media/seattle-2023/opticks.md b/content/english/media/seattle-2023/opticks.md
index c8d1d1a..bba8a71 100644
--- a/content/english/media/seattle-2023/opticks.md
+++ b/content/english/media/seattle-2023/opticks.md
@@ -4,7 +4,7 @@ mediatype="demo"
 conference="seattle-2023"
 date="2023-11-16T16:40:00-08:00"
 description="RGB that's easy to program and use."
-thumbnail="/images/image-placeholder-16x9.png"
+thumbnail="/images/thumbnails/2023HMSRGB.png"
 
 [[videos]]
 title="Opticks demo"
diff --git a/content/english/media/seattle-2023/orca.md b/content/english/media/seattle-2023/orca.md
index 094d41b..c7a3057 100644
--- a/content/english/media/seattle-2023/orca.md
+++ b/content/english/media/seattle-2023/orca.md
@@ -4,7 +4,7 @@ mediatype="demo"
 conference="seattle-2023"
 date="2023-11-15T15:40:00-08:00"
 description="WebAssembly apps without the web. A brand-new stack for cross-platform apps."
-thumbnail="/images/image-placeholder-16x9.png"
+thumbnail="/images/thumbnails/2023HMSOrca.png"
 
 [[videos]]
 title="Orca"
diff --git a/content/english/media/seattle-2023/serenum.md b/content/english/media/seattle-2023/serenum.md
index 423a4c9..8561ac2 100644
--- a/content/english/media/seattle-2023/serenum.md
+++ b/content/english/media/seattle-2023/serenum.md
@@ -4,7 +4,7 @@ mediatype="demo"
 conference="seattle-2023"
 date="2023-11-16T16:20:00-08:00"
 description="Solving the Thirty Million Line Problem. Not affiliated with Molly Rocket, Inc."
-thumbnail="/images/image-placeholder-16x9.png"
+thumbnail="/images/thumbnails/2023HMSSerenum.png"
 
 [[videos]]
 title="Serenum"
diff --git a/content/english/media/seattle-2023/shapeup.md b/content/english/media/seattle-2023/shapeup.md
index a815ee0..6e626ab 100644
--- a/content/english/media/seattle-2023/shapeup.md
+++ b/content/english/media/seattle-2023/shapeup.md
@@ -4,7 +4,7 @@ mediatype="demo"
 conference="seattle-2023"
 date="2023-11-15T17:00:00-08:00"
 description="Create 3D models by adding and subtracting shapes, instead of dealing with vertices and faces."
-thumbnail="/images/image-placeholder-16x9.png"
+thumbnail="/images/thumbnails/2023HMSShapeUp.png"
 
 [[videos]]
 title="ShapeUp"
diff --git a/content/english/media/seattle-2023/sqls-inner-workings.md b/content/english/media/seattle-2023/sqls-inner-workings.md
index 953b2c8..71b71a3 100644
--- a/content/english/media/seattle-2023/sqls-inner-workings.md
+++ b/content/english/media/seattle-2023/sqls-inner-workings.md
@@ -4,7 +4,7 @@ mediatype="talk"
 conference="seattle-2023"
 date="2023-11-15T16:00:00-08:00"
 description="An exposé by a whistleblower investigating the marketing claims of “It’s just the same old SQL you know.”"
-thumbnail="/images/image-placeholder-16x9.png"
+thumbnail="/images/thumbnails/2023HMSNikita.png"
 
 [[videos]]
 title="SQL's Inner Workings"
diff --git a/content/english/media/seattle-2023/tb.md b/content/english/media/seattle-2023/tb.md
index 1649fbc..870d32d 100644
--- a/content/english/media/seattle-2023/tb.md
+++ b/content/english/media/seattle-2023/tb.md
@@ -4,7 +4,7 @@ mediatype="demo"
 conference="seattle-2023"
 date="2023-11-15T17:40:00-08:00"
 description="The future of compiler backends."
-thumbnail="/images/image-placeholder-16x9.png"
+thumbnail="/images/thumbnails/2023HMSYasser.png"
 
 [[videos]]
 title="Tilde Backend"
diff --git a/content/english/media/seattle-2023/the-ethics-of-psychological-manipulation.md b/content/english/media/seattle-2023/the-ethics-of-psychological-manipulation.md
index 4cd4854..e6384ad 100644
--- a/content/english/media/seattle-2023/the-ethics-of-psychological-manipulation.md
+++ b/content/english/media/seattle-2023/the-ethics-of-psychological-manipulation.md
@@ -4,7 +4,7 @@ mediatype="talk"
 conference="seattle-2023"
 date="2023-11-16T15:20:00-08:00"
 description="A look at how video games make money."
-thumbnail="/images/image-placeholder-16x9.png"
+thumbnail="/images/thumbnails/2023HMSScott.png"
 
 [[videos]]
 title="The Ethics of Psychological Manipulation"
diff --git a/content/english/media/seattle-2023/the-state-of-software-ux.md b/content/english/media/seattle-2023/the-state-of-software-ux.md
index 2eb745f..8320d1c 100644
--- a/content/english/media/seattle-2023/the-state-of-software-ux.md
+++ b/content/english/media/seattle-2023/the-state-of-software-ux.md
@@ -4,7 +4,7 @@ mediatype="talk"
 conference="seattle-2023"
 date="2023-11-16T11:00:00-08:00"
 description="A survey of user-hostile games, apps, and software."
-thumbnail="/images/image-placeholder-16x9.png"
+thumbnail="/images/thumbnails/2023HMSJes.png"
 
 [[videos]]
 title="The State of Software UX"
diff --git a/content/english/media/seattle-2023/whitebox.md b/content/english/media/seattle-2023/whitebox.md
index e218ecd..c8f11ce 100644
--- a/content/english/media/seattle-2023/whitebox.md
+++ b/content/english/media/seattle-2023/whitebox.md
@@ -4,7 +4,7 @@ mediatype="demo"
 conference="seattle-2023"
 date="2023-11-16T17:00:00-08:00"
 description="The world’s only live timeline debugger."
-thumbnail="/images/image-placeholder-16x9.png"
+thumbnail="/images/thumbnails/2023HMSWhitebox.png"
 
 [[videos]]
 title="Whitebox"