Differences in device processing power
To play high-resolution videos through a tunnel, a device needs to simultaneously decrypt network packets and decode a heavy VP9 or AV1 stream. The TV processor gets 100% overloaded, drops buffering, and lowers quality to a minimum, whereas a mobile chip handles this load in a fraction of a second.
How to fix lagging on a TV
- connect the TV to the router via an Ethernet cable instead of wireless Wi-Fi
- lower the video resolution in player settings from 4K to stable 1080p to ease the video chip's load
- move the secure connection setup directly to a powerful home router
- use a separate TV box with a modern processor instead of the built-in screen system