I do not know how to "support" ensure the truth of the scammer is the owner of the claimed YouTube accounts.
But if "support" only believes without clarifying or contacting the official accounts shown by the scammer it is stupid. I think the support's work must be professional.
Who is the "support" in the conversation, is that you? Do you own a gambling site?
You are right, i just mention how scammer introduce himself
hope others can alert
How can you blindly trusted someone on Youtube though? Almost all social media are full of scammers and fraud and I do hope that you should that by now.
The best thing you can do is report that Youtube channel so that it won't scam any more people. Consider this a *expensive* lessons to learn on your end.