Just FYI. Comments nearly exactly like yours on Reddit were used in copyright troll lawsuits against ISPs as evidence they didn’t do enough to enforce copyright and were negligent and legally liable.
Further when that didn’t work the copyright agency sued Reddit to try to unmask the identities of those people to bring legal proceedings against them to coerce them into testifying against their ISP at threat of being in trouble for their activities. Reddit was big enough to fight off the lawsuit luckily but be careful.
No.
HDMI does have a feature called Ethernet over HDMI that in theory could allow that.
Thing is though it’s literally never been implemented in anything. It died because cheap WiFi became common.
For it to work you’d need both the TV and Chromecast and HDMI cable all to support it. It’s not uncommon on cables and a surprising amount of them include it in features list (probably to trick low info people).
But I believe that’s a hardware design thing so not something even a software update could enable. It costs extra money and they’re already paying for a WiFi chip so why bother?