260 karma · joined June 9, 2023
Just because it's a LAN doesn't mean you have to be physically present to access the device. Another device on your network could be compromised, giving an attacker access to anything that the device can access. For example, say you get tricked into downloading something nasty on your laptop. Now they have remote access to your laptop, giving them access to your NAS. Ultimately it comes down to your threat model. For an average home user, it's probably not very likely that not having 2fa on LAN-only devices would be a huge risk. But for a business with thousands of employees that could plug who-knows-what into your network? Much higher risk.
I guess the one angle I can see is that by watching the local copy, you aren't seeing any ads that might be on the page/video. But the website could embed ads into the downloaded video.
Really, how is this any different than recording TV on a VCR (or DVR)?
I've been wondering for a while when I read stuff like this, why don't modern airplanes have exterior cameras that cover every surface? I watched a video recently about a flight where one of the engines literally detached and the pilots didn't know the extent of the damage until after. Why not just have cameras they can quickly pull up to check stuff like this?