I’ve had enough movies and shows unavailable to me that I’m doing exactly this. I bought a PC just to use as a media server, set up Plex, and started ripping all my DVDs to the computer and I can stream them to my Chromecast. No ads, available permanently. I can buy movies from thrift shops and garage sales, and at least for now DVDs are super cheap. It’s not high quality video but I don’t really care too much.