What is the risk for their here?
BC.Game doesn't do KYC for fun, but has to do it as part of, for example, money laundering guidelines, otherwise they risk high fines and/or the closure of the company. Imagine a fictitious example where it is proven that some 100k were used to launder money from illegal activities. The trail then leads back to an account at BC.Game for which they did not perform KYC properly or the account was KYC-approved even though the KYC data was falsified. In such a case, BC.Game would also be liable to legal action.
Even playing your game, why would a mother be warmed or threatned by a son to receive over 90000 usd?
How stupid would be being present on a video meeting without knowing the basics of casino?
Ask the question the other way around. Why would BC.Game refuse to pay you if everything was above board? 90k may sound like a lot of money, but BC.Game probably carries out such withdrawals several times an hour - at least other casinos of a similar size have such a turnover. Why would BC.Game put their reputation on the line in your case and refuse to pay out to you without justification?
I understand your situation, of course, but I completely trust BC.Game's assessment and think it's great that they gave you another chance to prove your identity in a video call. You really can't blame BC.Game for the fact that several alarm bells were ringing during this call and they had to refuse you the approval.