Check out DOOM WAD World. They also have a Discord.
Here is a forum thread on twitch streamers from doomworld.
Styx Gaming
Doom TAS Archive
Aquarius199
JP Lebreton Home of the weekly show "WAD Wednesday"
Decino: Doom playthroughs/commentary and occasional mechanics explained videos.
John Suitepee: Doom WAD playthroughs with commentary, such as "first maps"
Civvie11 I love this guy! He even reviewed our game, and loved it!
GManLives this guy was the first I saw to review us as well! I used to binge watch his videos anyway
Major Arlene

You can also check these guys out for boomer shooters, not just specific to doom:
Icaruslives
Mtpain27
BigMacDavis
That Nukem Guy
Mutant Mods

Add your channel/videos here! Shoot me an email.

Join the Doom Master Wadazine Community Discord!
Also: here is another forum post, more specifically Youtube channels this time!