>>/17579/
Yes, I've seen his critics. They mostly say that videos are cut from many bad tries and that his opinion about history is wrong.
First statement looks pretty real - he can't be that good, sometimes his accuracy looks inhuman, so he clearly tried to record some episodes many times. But even if he isn't a godly archer, he is very skilled person.
Second is more doubtful. As far as I know, we have no continuous tradition of military archery, at least in European world. And not only the archery. Most of our knowledge about military operations, tactics and skills are reconstructed from shady manuscripts, historical records and paintings. For example, many parts of Greek and Roman tactics reconstructed by historians from sculptures and occasional writings of some unrelated people (like philosophers or historians of Roman times, who never really seen a battle).
Sometimes people who work with gear, i.e. military reenactors and even larpers, know more just because they tried to use that gear, and humans didn't really changed physically in 2000 years. Of course they mostly reinvent many things, but I doubt that there is too much variety in bow or sword usage for average person.