What device do you have?
Restar your módem And turn off And on your box
tell me a channel to see.
the hardware can be another factor leaves the playback with factory settings.
Those channels that you say are working very well.
and I'm not an administrator.
Sounds more like isp throttling your connection
What is your internet provider?
what it means?, I have even better video performance here than what your video shows, the problem was fixed this morning by the provider, let me tell you something, I have 4k channels here without any problem, so what more I have to check, just like a told you before, I am not a newbie, so please, let my threat alone...
thank you
You are a seller of another service.
good luck!!