FYI Tesseract as implemented on e.g. dubvee.org, an alternative front-end UI for Lemmy made by Admiral Patrick, has an embedded player already, which doesn't need an account to play the videos. See it in action at https://tesseract.dubvee.org/c/loops@midwest.social, or read more about Tesseract at https://dubvee.org/post/2453173. I hope to see even greater levels of integration soon, perhaps in PieFed!:-)