I've been obsessed with keyword research since learning about it in 2010. When you target keywords with Youtube videos, it is usually a recipe for success over time. This aligns the searchers in your market, your Youtube goals, and your videos.
Repeating this process with keyword videos can be a stand alone strategy, or it can be an augment to your online promotional efforts. It takes consistency, just like everything.
But, this route can shortcut success as opposed to creating giant blog posts. Video is much more likely to get easy traffic. Let me know what you think.