Is there anything inaccurate in how Webull's CEO is explaining why they/robinhood/other brokerages have halted trading on the various wsb stocks?

https://finance.yahoo.com/video/heres-why-robinhood-restricting-users-173049721.html?.tsrc=fin-srch

TLDR: high volatility in the stock means that the brokerage's clearing house requires more collateral to settle a trade, which has gotten too expensive for robinhood/others to stomach