I'm honestly not sure what you're trying to say here. You need to format your writing so that it's more easily comprehensible. This isn't a verbal exchange, you can't just dictate into the chat box.
I can tell you that people following videos on youtube are script kiddies, not actual hackers, and theres no video on youtube of "how to steal someone's league account"
The only way your account can get stolen without you entering information somewhere is from SQL injection, and anyone doing that to Riot A) has no control over what account info they get and B) steals accounts at a very slow rate compared to the number of accounts.
Nobody "hacked" any of these accounts, they purchased the stolen ones off people who extract account information through other means. And if your email is verified, these people can't change your password to actually finalize stealing the account, unless they also have access to your email which is very unlikely.
I can also say from experience that if you know your account is compromised, Riot will help you deal with it. Posting here about hacked accounts does nothing. The fact that so many people are ignorant of the correct procedure hints to me that they may be ignorant of other things regarding account security since they obviously don't take the time to learn about what they're doing.
If it were "so easy" for someone to steal an account, why does it only happen to something like 0.001% of accounts? Remember that 200 people could post here every day and that would still be an infinitesimally small fraction of the actual accounts in game.
Even if hackers were stealing 10,000 accounts a day, it would take them EIGHT YEARS to steal every account in the game.
The actual rate of account compromise in league isn't any more than account compromise for other online services.
Furthermore, considering the nature of this board, I would guess that a portion of people never got hacked and think they can lie their way out of their ban.