The best alternatives to Vookmark are Zinc, Play, and Youtube Tag Generator. If these 3 options don't work for you, we've listed a few more alternatives below.
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Play is the best way to bookmark YouTube videos to watch later on your iPhone, iPad, and Mac. Import or add using drag and drop. Search, filter, sort, and organize using tags. iCloud syncs everything. Add YouTube to your Home Screen, with Play's widgets.
Our Youtube Tag Generator tool is a 100% free tool. It helps you to generate 10+ tags for youtube videos. You need to enter your video topic to generate related tags. You can copy and use relevant tags on your youtube video to get a higher ranking.
tubeSeek allows users to recall YouTube videos that are in a foreign language and have foreign language titles/tags. You no longer have to depend on the thumbnails to remember useful videos in your playlists. Just tag with your own words using tubeSeek.