I just noticed that, when I zoom in with the categories (the little "quick links") open on the side of the screen, videos don't fit on the forum column. Instead, they get overlapped into the woodgrain area, and look like a book that got folded.
This happened in both Opera and Chrome. It did not occur when zoomed out, or when I had the categories hidden on the side of the screen (though, at this point, it stopped trying to scale to my window screen, but that's a different can of worms, or kettle of fish, or random container of random animals).
Looks like you still have the forum categories showing, which pushes things over to the right a bit. Scroll to the top of the page and hit the button and it might make things better for you. Else you'll have to not zoom in so much.
I actually usually operate with the categories closed, for more screen area, which is why I hadn't known about the video doing that. It doesn't bother me, but I thought someone should know in case it was a new glitch caused by changing the buttons from 3 buttons (home, hide categories and whatever the third one was) to just the "hide/show" button. I noticed that the weird warping/overlapping doesn't occur with the categories closed, no matter how far I zoomed in (not that I ever really operate that far zoomed in unless my toddler wants to pretend to blow out the smoke on Paul's cute little cabin at the bottom left corner, ).
Anyway, I wasn't complaining, just pointing it out in case it was an unwanted/fixable glitch that no one else hadn't noticed yet .