Captionfy.io - Captionfy is a free Youtube community captions platform with a subtitles/captions editor that you can use to create captions for any public Youtube video.
PocketTube - Group YouTube subscriptions into YouTube folder. Video Deck for Youtube. Mark as watched videos. Filter YouTube video. Youtube mode
Kapwing - Collaborative video editor for modern creative teams
YouTube - Our mission is to give everyone a voice and show them the world.
Captionz - Watch YouTube with dual captions, A-B repeat and more
NewPipe - NewPipe is a lightweight YouTube front-end for Android.