Why do you record a video which any AI video generator likely can mimik? For others and me to be able to verify that you actually control the private key of said address, you post the text and the Bitcoin signature here as plain text, simple as that. Then it can be verified cryptographically. You make things unnecessary complicated and if the signature is truncated, it's worthless.
To make it good you could e.g. use the text that you cited from me, add the current date and your account name, so that it can't be pre-fabricated. You can find inspiration e.g. from this topic's post
Re: Stake your Bitcoin address here. It's not rocket science exactly.
Adding your account name here and the current date shows that the signed message text likely wasn't pre-produced in the past and I consider this important and necessary. There's a reason that most staked Bitcoin addresses use such text details as in the linked post and address staking topic.
I repeat: I will publicly apologize if I can verify properly that you actually control the private key of the funded address. I have no problem to admit when I was wrong.
And I repeat again: because the wallet is not only in your own hands and if copies of it, given away in the past, are also a legit old legacy wallet AND the wallet's password is now known publicly, I highly recommend to move the coins to a different wallet which private keys only you control.
I don't need to understand why you don't see this as a potential problem for the coins of that address. Whatever...