Specifics On Using Videos For Rankings?

In using videos to boost PR, which way is the best way to add in URL’s (author, description, etc..)? Should I load the title and description with long-tailed keywords? And should I change them up or keep just a few and use them repeatedly throughout?

I have quite a few videos and I’m trying to figure out what the best way to go about getting them out there and seen… while raising my PR and abiding by Google’s rules.

Thank you.