Three Youtube videos for your entertainment and edification:
Berserk Monster Manual
Ever wonder about the monsters and foes found in the Berserk manga? Well, wonder no more. Youtuber RealLifeRyan has a series called Berserk Monster Manual that delves into all things gruesome and foul. RIP Kentaro Miura, you were a real one. Playlist here.
Ravenloft Travel Agent
Do you desire a guided tour through the old versions of Ravenloft's Domains of Dread? RavenloftTravelAgent has you covered. Playlists here.
Claymore: The Imperfect Trailblazer
Bonsai Pop has done a very nice video on the history and themes of the Claymore manga and anime.