If you know what is the quantum computer now. Then you may understand it is not possible to know this things 10 years before.
I saw the whole video and now I have a doubt. The host said that quantum computer can be used to create private keys. If that's possible then I believe quantum computers can also be used to hack the private keys of other users. This will make the bitcoin network very vulnerable and hence will break the network eventually by creating a panic in the market.