ummmm. 3?

3 is a difficult number, or 4 in your case

I loved the Coldplay video they made in Sydney last year. Lots of happy people that day.
They were just walking around having so much fun. I liked a lot of their vids.

Coldplay - A Sky Full Of Stars

Get Back [live on the roof] - The Beatles

Subterranean Homesick Blues - Dylan

I really like a lot of different types spanning decades so it's too difficult a question for me to answer really but I tried.

Jamiriquai made good videos. There was a video with Christopher Walken dancing in it that I liked too. Fat Boy Slim.