nomis5 - 6:10 pm on Oct 29, 2012 (gmt 0)
Embedding YouTube videos doesn't seem to affect my sites either way, Google seems to ignore them as far as ranking is concerned. That's my experience. By the way, I presume you are talking about your own videos and not someone else's. The ones I embed are all mine.
I'm not sure what effect embedding foreign language videos would have.