Video control seem to have event handling issues when the video is transformed, or has a transformed parent. Bug 22109 fixes the slider issues, but there are others (e.g. you can click the play button, and it responds, but the video does not play).
Created attachment 24952 [details] Testcase
Created attachment 24953 [details] Fixed testcase
Created attachment 25299 [details] Patch, testcase, changelog
Comment on attachment 25299 [details] Patch, testcase, changelog r=me That FIXME in MediaPlayer could be more enlightening.
Fixed the comment, and committed: Committed r38612 M WebCore/ChangeLog M WebCore/platform/graphics/MediaPlayer.h M WebCore/rendering/RenderMedia.cpp A LayoutTests/media/video-controls-transformed-expected.txt A LayoutTests/media/video-controls-transformed.html M LayoutTests/ChangeLog r38612 = 154846681526fcb9b0fb6b824768fa0c30f14020 (trunk)