Three great channels that regularly—if not almost exclusively—talk about Chaosium games (Call of Cthulhu, RuneQuest) are highlighted:
GAME GEEKS RPG
Game Geeks RPG is hosted by Kurt Wiegel, "a scientist and a grandmaster of gaming... Call of Cthulhu also gets plenty of love on this channel, with tons of adventure reviews."
Seth Skorkowsky's speciality is "examining adventures published for Call of Cthulhu and its relatives... In addition to all the adventure reviews/advice sessions, Seth is currently doing a series of videos about the Call of Cthulhu role-playing game in general... If you’re new to running Cthulhu Mythos games, you need to watch this channel. If you’re an experienced Cthulhu GM and just want some new ideas, you need to watch this channel."
BUD'S RPG REVIEW
Bud's RPG Review: "If RuneQuest is your jam then Bud is your man."