I follow a decent amount of video essay channels on YouTube, some better than others, here are a few that I think operate around the same level of quality as Every Frame a Painting:
Lessons from the Screenplay - Similar to EFaP but for screenplays (obviously)
Wendover Productions - Many topics but generally focuses on Logistics, Aviation, Economics, Geography, and their intersections
Ahoy - Video games, firearms, and their intersection
NoClip - Video games; Their format is more traditional documentary as opposed to video essay, but I feel compelled to mention them here due to their quality work (disclaimer: I donate to them via Patreon)
Lessons from the Screenplay - Similar to EFaP but for screenplays (obviously)
Wendover Productions - Many topics but generally focuses on Logistics, Aviation, Economics, Geography, and their intersections
Ahoy - Video games, firearms, and their intersection
NoClip - Video games; Their format is more traditional documentary as opposed to video essay, but I feel compelled to mention them here due to their quality work (disclaimer: I donate to them via Patreon)