As a side note, please consider giving posts more useful titles, such as "Why is Invidious downloading so slowly?" and, since Invidious is a hosted software and not a single site, tell us which instance you're using.
Piracy
Welcome to /c/piracy
No netflix or streaming services landlubbers allowed, this is pirates territory.
I used to use invidious.osi.kr and that was slow as heck, switched to vid.puffyan.us, same story
My point is that "INVIDIOUS" is a very unhelpful title, and it would be helpful to edit it into something more descriptive and less clickbaity.
Try a different server (I'd recommend this one).
If that doesn't work, try running LibreSpeed to see if it's you. If it is, you can try disabling any VPN, proxy, or Tor daemon you have running and try again, or simply turn your internet (whether it's ethernet, WiFi, LiFi, or mobile data) off and on again.
I've tried your server, and it still doesn't give me at least one meg every second
Weird. Which browser are you using?
Brave
Huh, weird. And what OS are you running?
Android
Keep in mind that I used Brave/Andr, Firefox/Andr, and Firefox/Pop, didn't change anything
I think it must just be your internet. Sorry!
Then why is it only invidious sites that are so slow, I can download Pop! OS .isos and I get rather good speeds
It could be that your ISP is trying to slow down multimedia downloads. Try using a VPN, and see how an Invidious download compares to a Pop!_OS ISO.
If that fails, I'm afraid I'm all out of ideas.
self hosting is the only way you can guarantee speed. Public instances serve many people. There's only so much they can handle.
maybe try a different invidious server?
This differs per server. Some servers have more bandwidth and have better speed, while other servers have worse speeds.