This is Peter Yaworski's YouTube channel (https://www.youtube.com/channel/UCS0y5e-AMsZO8GEFtKBAzkA); here, you can find some of the material described in his book Hacking 101 with demos and more proofs of concept. The valuable thing about his channel is that there are basic and advanced videos, so all bug bounty hunters can take advantage of the material published.