HSHTG - Generate, manage, save and edit hashtags just in a few finger tap
you-tldr - Get the tldr of any YouTube video in seconds
hashtags.org - Hashtag is an extensive hashtag research platform for analytics and tracking of hashtags, providing...
tubecut. - The only YouTube downloader allows you to trim specific time
HashtagWiki.com - Hashtag Generator Tool
Matstad - A Reddit style YouTube app