Popular hashtags for Instagram / YouTube by category

Directory of popular hashtags for Instagram. You can successfully use most of them to promote your posts on other social networks: Twitter, Facebook, YouTube and others.
Hashtags first appeared on Twitter, where they showed their high efficiency and usability. With their help, we managed to implement a convenient and fast search for similar publications.
Instagram is probably the only social network where hashtags are its foundation, and not a useful and convenient addition. Properly selected hashtags allow the Instagram account holder to get lots of likes, subscribers and reposts.