In episode 201 of Semantic Mastery's weekly Hump Day Hangouts, one viewer asked if one should use the same video when running the same rank and rent video campaign every month.
The exact question was:
When you run the same campaign every month do you use the same videos or create a new one every month? You mentioned you could end up with several videos ranked for the same keyword which confused me a little since I can't see Google ranking the same video twice. Plus, if this is an ongoing marketing campaign, I imagine if you used the same video your YouTube channel would be full of the same video listed over and over again.