Haven't watched the video, going by your title I'm assuming it's similar to a feature on macbooks where they can be plugged straight into another Mac, thunderbolt, or FireWire device, while powered off, and have their hard drive accessed directly from another computer.

There is code for this in the Linux kernel (sadly not quite the plug and play experience that Macs have, you need to boot after plugging in AFAIK?), and a news article about the commit that added it to the kernel for Thunderbolt was posted to this community a while back. Sadly I have no idea what devices support it, but it is at least is open source.

Currently there is support for a network connection over thunderbolt you can use as a basis. If you want to send other data without network encapsulation, you'll need to write a kernel module for that.

https://www.kernel.org/doc/html/latest/admin-guide/thunderbolt.html#networking-over-thunderbolt-cable
https://christian.kellner.me/2018/05/24/thunderbolt-networking-on-linux/

Here is an alternative Piped link(s):

https://piped.video/watch?v=GqCwLjhb4YY

Piped is a privacy-respecting open-source alternative frontend to YouTube.

I'm open-source; check me out at GitHub.

USB easy transfer cables? Sure, looks like they just present a point to point network, so you can do whatever you want over that link.

Probably. File transfer can be replaced with rsync or something. Video I have no idea. Maybe use a capture card?

It looks as if you can do it, but it doesn't automagically configure itself on Linux.

Intel seems pretty good about standardizing their TB features so we may see it in a USB4.x or USB5 standard.

That said, USB4 is TB4 capable so it may be able to be introduced into USB4 as is.

LTT is trash