Got the captcha endless wave yesterday using freetube on linux until I changed VPN nodes. I don’t think it’s proxying (not checked though)

Ethernet over hdmi

https://thehometheaterdiy.com/hdmi-with-ethernet/

https://www.cmple.com/learn/learning-center-hdmi-cables-with-ethernet

They can also hijack the connection of a connected box (ethernet over hdmi) or via a connected phone (bluetooth & chromecast iirc)

Sure but who do you make the subject access request to ? Facebook Google Microsoft Amazon etc individually ?