[Blazin]

It was someone else's device they forgot the pin to get on the device a 4 digit pin after 3 failed attempts it wipes the whole thing. This guy found a flaw in the firmware that allowed him to get the private key by opening the device up and hooking onto the chips and stuff. It's open source so easier to look for things.
Those hardware wallets have been around since like 2015 the specific vuln he exploited was patched in 2017 but this guy had an older version of the hardware wallet with outdated firmware. So it's harder to hack now, but it's open source so people can keep looking.

The actual exploit when run took 3 hours to complete but it did it in the end. Surprising to me that the actual pin to access the device and get the data was not encrypted....

[123]

Impressive. I added this video to my “Watch Later”. Would definitely watch this one.

[SIM-353284]

Quite a neat trick, hardware hacking is very good and interesting.

[The Host]

Can’t people just steal trezor wallets and get this guy to do a service. (Sounds like a big issue with offline wallets)

[webdev77]

Can’t people just steal trezor wallets and get this guy to do a service. (Sounds like a big issue with offline wallets)

Perhaps. It's unlikely this guy intends to offer his services on a larger scale though. People with these kinds of skills often end up retiring early and doing whatever they want to do.

[Blockonome]

This is what I call dedication, I have seen this video as well and shows that security is often just an illusion. Great job, good they patched it, until someone find the next hidden key to private wallets.