And yet they still fail to address the most irritating aspect of their video UI -- all too often the video timeline controls remain visible while movies are playing and don't go away. This has been going on for _years_. They seem incapable of combining the mousemove event and a timer to automatically hide the controls...
Across various browsers and operating systems I have never encountered this... As long as my mouse isn't hovering over the controls they work perfectly for me.
I've noticed a similar bug in Chrome on a Mac where the cursor doesn't disappear when you're watching a series, have finished one episode and continue to the next episode(s).
On the first episode in the 'chain' the cursor disappears after a few seconds of inactivity, but for all subsequent episodes it does not- very odd. You have to refresh the page to reload everything to make it start disappearing again!