If you're interested in Skyrim, Fudgemuppet is awesome. They've made content for what must be a decade now, discussing all kinds of aspects of Elder Scrolls games with a focus on Skyrim - from lore to builds to discussions of the upcoming TES IV. Can't recommend them enough to get a good grasp on Elder Scrolls lore.

Ghostcharm is also an amazing content creator who makes, among other formats, "villainpedia" and "heropedia" entries for video game characters and explores the different facets and nuances of the discussed characters. Some of the characters are Glados from Portal, Mancar Cameron from Oblivion or even more nuanced characters like Arthas from the Warcraft series or the Daedric prince Sheogorath from the Elder Scrolls (more specifically the Shivering Isles expansion for Oblivion). Really interesting lore and analysis videos, huge recommendation.