hi,

Last update for today (11:30pm here, I'm way too tired!)

did not find any quick way to solve the video playback problem. Tried playing the default n8x0 video in canola: the lag described before does NOT occur. the video did lag 3-4 times during playback, but I consider this OK, since I know how much resources canola eats.
tried on a completely random video: no lag. Will focus on when/where the problem occurs tomorrow.

update on the hardware "back" button bug: still hdw button still does not work when the video isn't playing.

Good night everyone

Ilia