Heilemann wrote: Where are those clips from?
Some of the young GL clips are from the CBS broadcast: http://www.youtube.com/watch?v=fN3aDEpSRZU (jump to 4:45)
TMZ clip: http://www.tmz.com/2012/03/29/george-lucas-star-wars-dead/
The recent Oprah special. The rest of the young GL probably Making of SW: http://www.youtube.com/watch?v=CkP4Z3PNfoA