Well I am sure he looks in here too , but he mentions a few facts in his video that were not in the BEA report and were not here on PPRuNe either, so he must have good outside sources, but with 850.000 subscribers on his you tube videos and 12.000 members on his forum I guess he has an advantage over us in getting reliable and correct info.
For instance there is a small hint in this video that he knows exactly who the pilots were , we will see when the final report comes out if he was right.