If you ever suspect anyone of cheating, then report it: https://support.chess.com/en/articles/8562517-how-do-i-report-someone
If you just want to discuss anything related to cheating, then please keep it in this chess.com club instead of the public forums: https://www.chess.com/club/cheating-forum
It is also typically a bad idea to include usernames when you accuse someone, but since this is in the video link, I'll leave it in (you can use usernames and other information when you report though). I am not currently a part of chess.com's Fair Play Team, but a 12 game win streak in bullet might not be as unlikely as it sounds. They've played about 2,500 bullet games, so statistically a win streak of 12 eventually is fairly likely (same with losing streaks).
Ok guys, so i was watching youtube and found something really fishy.
There's this guy called Croissant on youtube and in his video he went from his past peak of 1800 to 2000 within a week, its very impressive and i liked the video but after i went to his chess.com account i found something weird.
After he really struggled to get 2000, instantly after that he went on 12 game winning streak on bullet and got 2130, do you guys think hes cheating?
Link to the video: https://www.youtube.com/watch?v=eJFGh8mQjiI&t=723s
His chess.com account: https://www.chess.com/member/croissantdealer