I have seen a video on bitcoin. On that video there was a person who had many bitcoins but at that time bitcoins were not so much used so he hidden those bitcoins in a place and made document about where the bitcoins was. But alas! When bitcoins got market he forgot where he kept those and lost the document. I don't know the exact price but it was more than 1 million.
Can you tell me is it a real or fake?
There are cases like these that are real especially if they are the early investors of bitcoin and they forgot their private keys because of the time that passes before they know that it worth millions already. But there are cases also that the youtube blogger are only creating a scenario just to earn a little profit from the viewers.
All of it were possible and we cannot really point out the correct scenario there as your statement are also lacking because if you just drop the link to that video then we can give a better opinion to this matter whether it is real or not.