Though this video is inherently angled towards the drums, I think its truths have a wider context as well. I've never really considered myself a great improviser, but some of the things said in this video really connected with me. I think the power repetition is such an under appreciated concept in composition. Of course, it's apparent in almost every song ever composed, but often I think that's just done 'because', rather than a conscious and considered choice.
Anyway, a great video. If you want to check some of his playing, I recommend this one: