this problem was reported here when it first started happening (early last weekend, I think). Marcelo (handful) replied that their team was seeing the same behavior -- it looks like youtube changed something, and the canola plugin would need to be updated. he further went on to say that this past Monday was a holiday there, so nobody would be able to take a look at the problem and coding a fix until Tuesday (yesterday).

Patience. The Canola development team is a good bunch of guys... give 'em a chance, and I'm sure they'll have things ironed out ASAP.