What about UHD 4K streaming online for two TV's at the same time, might need faster than 80/20?
No, it won't. I've streamed 3 at the same time with no buffering on an 80/20 line (that usually returns around 70Mbps on a speed test). Usual 4K stream is ~15Mbps, sometimes up to ~20.
The only time I've ever come close to 40Mbps was the BBC Wimbledon live 4K trial on iPlayer, and they admitted later that was because they hadn't got all the bugs out of the live compression algorithms.
Edited by billford (Thu 15-Oct-20 15:01:04)