YouTube UI nuttiness resolved, it seems

[prog]

I declare the YouTube craziness I spotted yesterday to be an accident on their part. Those video-switching controls went away entirely last night, and now they're back - but only at the end of the video, where they make much more sense. I will give them the benefit of the doubt and assume that that's where they were supposed to be all along, but they had a release-engineering oopsie and published an early or otherwise flawed version of the player.