( i have not seen the video )
However, to respond to the title of the video - JF17 has had a lot of competition from the FA/50 and lost to it a few times( eg Malaysia and Egypt, Iraq, Indonesia(given Indonesia is also going for the J10CE now, the training similarity between the two would have helped them a lot, in hindsight of course ) ) as a light fighter. JF17 has royally beaten off the Tejas challenge in this segment of the market following effectively the USA withdrawing from this segment. There was a gap in the market, and China/Pakistan, India and Korea saw this and they developed solutions for it. I would say South Korea is winning the fight right now with 213 in service, and 74 additional deliveries + 100 now for Egypt, with JF17 coming second.
Source =
https://en.wikipedia.org/wiki/KAI_T-50_Golden_Eagle