How do you want to use video? Are you looking at incorporating video marketing as one of the best ways for you to get traffic to your websites? Or are you looking at it to promote your products or affiliate offers? -Mike
for the keywords research you can use the tools Google Ad words Keywords tools for getting the Idea of Traffic and competition of the keywords. u can also analysis the top 20 result in the SERP related to your keywords for your competitor. target only five or six keywords to a single URL for getting the best result.