I don't see anything wrong here. If Roku had a big outage for 3+ hours, there would probably be 8000 posts already.
It might help to list those 4 channels. There are thousands of Roku channels so I might not be trying any of the same ones.
And more information might help - like at what step do they fail and is there an error message? Have you tried quick fixes like a restart? Sorry, I have no way of knowing what things in FAQs you have already tried.
Are those friends and family using the same ISP?
Banned but back. Because why not?