EEVBlog is great, but... anybody just discovering the channel should be aware, Dave puts out content that fits into a number of different categories: educational, entertainment, edutainment, test equipment reviews / teardowns, mailbag, repairs, debunking, meta commentary about Youtube, career stuff, and "other". And purely educational stuff isn't a huge part of what he puts out these days. That said, he has put out some really good stuff, especially back when he was doing "Fundamentals Friday" as a routine thing. Just don't expect a steady stream of purely educational, "electronics fundamentals" stuff.