I saw the video. Vince Weldon does not actually claim that the 787 is unsafe. His point is that there are many questions to which Boeing and the FAA do not have the answers to yet, questions that should be looked into a little more than has been done.
An aicraft with so much leading edge technology should have a little more flight testing than the fast track program that was announced to make up for the production delays.
It is also said in the program that Airbus decided to use less composites in the A-350 but is under pressure from it scustomers to use more composites to save weight. There seems to be a reluctance......
One thing is for certain. The 787 will make or break Boeing.