Thank you for your response. I uploaded a video and another user uploaded a video with the same content.
YouTube gave me a strike but they made the other user's video 18+ only.
I have evidence. I screencaptured the other 18+ video and also my deleted video just to prove their different decision.
Strike means my channel is loosing many features for 6 months therefore I cannot use facilities can give me more hits and more income.
If YouTube punishes two users differently for the same content I thought this is discrimination. I think this is unfair I got penalty and the other user got almost nothing. I must point out this time for the same content.
The only problem I could get only 18+ and not 6 months penalty.
I cannot do anything further this is why I looking for an answer of a solicitor but unfortunately this is probably a special topic.