This is a consistency issue that I overlooked. Basically in the post feed, YouTube videos will be handled as Piped videos due to the “Convert YouTube To Piped” setting, but in the open post view, that setting is ignored. I’ll fix this in the next update so open post views respect that setting.
Thanks for letting me know about this!
Thanks for posting this! It helped me find a bug in my app where it would download that entire file into memory while attempting to fetch metadata for the link. Whoops.