If you want to play music along to a track or with other people, the most important thing to learn is how to play in time. Practising with a metronome is one of the best ways to do that. This video gives you some ideas of how.
7 Basic grooves
If you want to be able to play with a band, you'll need to know how to play in different musical genres. This video covers 7 grooves that cover loads of those genres and should have you jamming along with tracks pretty quickly.