Can you watch your friends play games on xbox live?

HI.

So I was wondering if i could watch xbl friends play xbox 360 games?

For example, if I don't have Halo: Reach, but one of my friends is playing it, can I watch them play on their xbox from my xbox?

if so, how?Can you watch your friends play games on xbox live?
No you cannot unless you were at there house lol they might end up inventing it though.Can you watch your friends play games on xbox live?
Only if the game supports spectating like Super Street Fighter IV.Can you watch your friends play games on xbox live?
No...unless they record the gameplay and they send it to you.