I think I've detect the reason behind the perceived 'wink'.

The mkv version of the clip wasn't playing on my laptop version of Vlc (it's an older mac and Vlc is no longer supporting that version of OSx with upgrades) so I had only the Boobtube version to judge it by.

When Yoda screws his face up in disappointment it drew my attention (and presumably the attention of others) to the right side of his face so I only saw the left side of the blink which registered as a wink. It's such a compelling illusion that I can still see it even though I know it's not there (check out the clip on youtube and see if you can confirm this).

I loaded the mkv over onto my big Mac and on a larger monitor it's clearly a blink and not a wink (sorry if this caused any anxiety) but I did see the still very noticeable wire/thread lowering the top rock down during the telekinesis training, which isn't noticeable on the smaller screen (I don't know if you intend to do something about that).