Not every site, but if they’re making money from people in Florida they would be subject to Florida law:

https://corporate.findlaw.com/litigation-disputes/standards-for-internet-jurisdiction.html

Sites outside the country are probably fine but if they’re in the USA not using a geolock is foolish.

If you can install it I’ve found that Remmina works well

They could vote absentee, but eventually they’d lose that right if they stayed in PR.

i use Jellyfin but a big thing that Plex has is the ability to easily stream remotely. Its doable with Jellyfin but requires a lot of manual configuration that a non technical user just can’t/won’t do.