Unwatched: RSS Video Player
“Watch Later Queue for YouTube” Untwatched is a great and free alternative to Play: "No autoplay, no alorithmic bottomless feed. Just the Videos queued up in the order you want to." I would suggest just downloading it and trying it out. And if you like it, sponsor the project on GitHub. apps.apple.com/us/app/unwatched-rss-video-player/id6477287463