What Internet Speed Do I Need for IPTV?

As a guide, per screen watching at the same time:

QualitySpeed
SD5 Mbps
HD10 Mbps
Full HD15–20 Mbps
4K25 Mbps or more

Stability matters as much as speed: a wired Ethernet connection or 5 GHz Wi-Fi gives the best results. If you buffer, see the buffering checklist.