Excellent video and some audio clips of the first two 787 test flights can be found at:
http://kpae.blogspot.com/In the most recent posting for the 2nd 787 flight, you will find several clickable links to some recorded audio from Boeing's radio frequencies where the problems with a hot brake and the nose gear are discussed with the chase plane. Audio from the 1st 787 flight is also archived on this web site. There are also many other archived Boeing test videos and photos at this most excellent web site which is focused on Paine Field (KPAE) where Boeing launches aircraft (767, 777, 747, and 787) produced at it's Everett, WA plant.