The videos are preloading when appears on Watch later screen or on
the channel you subscribed to. The icon changes to when the videos are
ready.
Creating video playlists
Organize your favorite videos into playlists and watch them in the
YouTube app.
Make sure that you're signed in to your Google account.
1. Open the YouTube app.
2. Browse or search for a video.
3. Tap next to the video title, and then tap Add to > New playlist.
4. Enter the playlist name, and then tap OK.
If you don't want to share the video playlist, select Private before
you tap OK.
5. To add another video to your playlist, browse or search for the
video, and then tap
next to the video title.
6. Tap Add to, and then tap the playlist name.
To access and watch your video playlists, tap the YouTube icon, and then
tap Playlist.
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