diff --git a/Tests/LibWeb/Layout/expected/html-dimensions.txt b/Tests/LibWeb/Layout/expected/html-dimensions.txt
new file mode 100644
index 00000000000..2b1d8f9893b
--- /dev/null
+++ b/Tests/LibWeb/Layout/expected/html-dimensions.txt
@@ -0,0 +1,15 @@
+Viewport <#document> at (0,0) content-size 800x600 children: not-inline
+  BlockContainer <html> at (0,0) content-size 800x736 [BFC] children: not-inline
+    BlockContainer <body> at (8,8) content-size 784x720 children: inline
+      frag 0 from VideoBox start: 0, length: 0, rect: [8,8 320x240] baseline: 240
+      frag 1 from VideoBox start: 0, length: 0, rect: [8,248 640x480] baseline: 480
+      VideoBox <video> at (8,8) content-size 320x240 children: not-inline
+      TextNode <#text>
+      VideoBox <video> at (8,248) content-size 640x480 children: not-inline
+      TextNode <#text>
+
+ViewportPaintable (Viewport<#document>) [0,0 800x600] overflow: [0,0 800x736]
+  PaintableWithLines (BlockContainer<HTML>) [0,0 800x736]
+    PaintableWithLines (BlockContainer<BODY>) [8,8 784x720]
+      VideoPaintable (VideoBox<VIDEO>) [8,8 320x240]
+      VideoPaintable (VideoBox<VIDEO>) [8,248 640x480]
diff --git a/Tests/LibWeb/Layout/input/html-dimensions.html b/Tests/LibWeb/Layout/input/html-dimensions.html
new file mode 100644
index 00000000000..5cc667d3b4b
--- /dev/null
+++ b/Tests/LibWeb/Layout/input/html-dimensions.html
@@ -0,0 +1,2 @@
+<video width="320" height="240" src="../../../../Base/home/anon/Videos/test-webm.webm"></video>
+<video width="640" height="480" src="../../../../Base/home/anon/Videos/test-webm.webm"></video>
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLVideoElement.h b/Userland/Libraries/LibWeb/HTML/HTMLVideoElement.h
index 9c707cb5fa1..cf55a6f7bc4 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLVideoElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLVideoElement.h
@@ -50,6 +50,9 @@ private:
 
     virtual void attribute_changed(FlyString const& name, Optional<String> const& value) override;
 
+    // https://html.spec.whatwg.org/multipage/media.html#the-video-element:dimension-attributes
+    virtual bool supports_dimension_attributes() const override { return true; }
+
     virtual JS::GCPtr<Layout::Node> create_layout_node(NonnullRefPtr<CSS::StyleProperties>) override;
 
     virtual void on_playing() override;
