The main purpose of using YouTube is to watch South movies, old cricket matches and interviews of various personalities ranging from Spiritual Gurus,leaders,sport person etc.
I use youtube for watching the following
1. News
2. Cooking and Gardening videos (it's a great stress buster for me)
3. Watching reviews of electronic items especially mobile phones and earphones.
4. old tv serials.
5. Movie Trailers
6. Short films and web series