The closest and easiest is to buy the digital download or Bluray, then get a rip from a pirate site. You've already bought the content, you just want to choose

The closest and easiest is to buy the digital download or Bluray, then get a rip from a pirate site. You've already bought the content, you just want to choose how to view it. I, like you, also have an LG OLED, and I use RARBG. I outlined my setup in a previous comment: I'm using rarbg as my main source which has magnet links that qBittorrent detects on click. I use mpv with Anime4k for animated content or an Nvidia Image Scaling glsl filter which is a decent upscaler/sharpener. I also use SVP for frame interpolation with an RTX 3080 which supports optical flow, and I assume it'll be even better in the RTX 40 series given their DLSS 3's frame interpolation exclusivity. It all looks incredible on my LG OLED TV/monitorm with 4k HDR 10 bit support.