Tuned Rocks📺 - Discover🔎 curated Youtube videos 24/7
OrganizeTube - Create video playlists from Youtube, Vimeo and other sources
Vidlis - Create music playlists from YouTube videos.
Learnamic - Free and paid K-12 learning resources from hundreds of providers, including educational apps, YouTube videos, online classes, printable worksheets, and more.
DiskyT - Youtube playlists done right
Playmoss - Create playlists from YouTube, Vimeo and SoundCloud