Hashtags

In the search theres the categories, top, videos, users, etc. There used to be a hashtag category, where you could watch videos only with that hashtag, but it's gone now. Just watching videos in the search isn't the same because I get random stuff not related to what I searched. Yes I can access hashtags in my favourites but I don't have every hashtag in there. Is there any other way to access them, does anyone know why they took it away?