Yeah, you're probably going to have a hard time finding this stuff on youtube. The prep companies wouldn't do it because they want you to buy their courses for this kind of material and, in general, you would have to be suspicious at best with homemade videos. Personally, I would only trust the pros with that sort of material. They know the best practices. I used Manhattan GMAT's 8 strategy books and Powerscores' CR Bible and they have worked great. I've been practicing at 15% higher on my practice tests after going through these materials. If you don't want to pay for that stuff, stick to the GMAT forums because at least in the forums, the material presented has to make it through the gambit of being analyzed by thousands of people who are studying the material and are always looking for gaps in logic.

Hmm. I've been making quant videos on YouTube, going through the OG 12th Ed. Once I finish the problem solving questions, I'm going to switch over to the verbal section and focus on critical reasoning.