Fan Films, the future of fanfics? Okay maybe not but they do seem like a growing medium. Here is a film looking at the split between young Dumbledore and Grindlewald. The special effects are kind of cheesy and they have silly "I'm casting at you as hard as I can!" faces but it is a pretty good look at important event that happened in the series' backstory. Also the only canonical queerness to the series. /bitterness
Where do I donate to get a young trans McGonagall film series? You know she learned transfiguration for a reason.