HackerOne: https://www.youtube.com/channel/UCsgzmECky2Q9lQMWzDwMhYw
Bugcrowd: https://www.youtube.com/channel/UCo1NHk_bgbAbDBc4JinrXww
PentesterLab: https://twitter.com/PentesterLab
PortSwigger: https://twitter.com/PortSwigger
Hacking Nights (Youtube channel): https://www.youtube.com/channel/UCFjEf9LSSlnASTa0q_k0akA
Bug Bounty Hunter Methodology: https://youtu.be/Qw1nNPiH_Go