Drm free digital video purchase doesn't seem to be a thing, but buying DVDs / blu rays and ripping them to a Plex / jellyfin server has gotten pretty approachable.
Fortunately, the physical market still allows for such things. That's my current path. Ripping Blu-rays isn't trivial, requiring specific drives and often replacing the firmware, but once you get it set up it's quite convenient.
Naturally though, the digital piracy framework is much easier and more common, but I still like actually owning my movies.