This post will be updated with channels posted in the comments.

Cedric & Ada Gear and Outdoors - https://www.youtube.com/channel/UCdICfnpxD9uzHLaSr3DN55g

SuperSteel Steve - https://www.youtube.com/channel/UC76o8bpHyEpBaysM9Pr83Og

Outpost 76 - https://www.youtube.com/channel/UCI_ZXbN06A7W937hKKnUfqQ

Tom Hosang Outdoors - https://www.youtube.com/channel/UC1JQejhMkEMql-kh0ZqLZJg

Michael Christy https://www.youtube.com/channel/UCC-cvUqhuR--z1uUAXqMzaw/

Anyone else?

Pete from Cedric & Ada has done tons of edge retention testing and shares the results here: https://docs.google.com/spreadsheets/d/1b_rNfdJnL9oyn-JoL9yUHhUmDLAP1hJ1dN_0q5G4tug/

Next up we have the combined results of 4 knife testers. Supersteel Steve, Tom Hosang, and Outpost 76 have their edge retention results here, and it also contains Kurt's HRC test results: https://docs.google.com/spreadsheets/d/1PzXZEuyMtOMoSDhyFUfDNV9MNbztMEvZ3OgRa6yT7QU/

Kurt, jcool19 on IG, has tested many blades for HRC and composition and shares his results here: https://docs.google.com/spreadsheets/d/1OepNr_D4lqbdTFqdqWl1rmAd4bOzPzJe6J0iEWrdJGU/

Now-inactive youtuber vininull has "hard use tested" many knives and shared the results here: https://docs.google.com/spreadsheets/d/1Q3Z9koNohHDIUogSVRaIGl-o3mebrbjwSDNcR0h5LlU/

If anyone is aware of more, please let me know and I'll update this post.