This is my go-to video downloader. Given the nature of the internet, it doesn't always work. But usually does.

If it doesn't work, an update or 2 usually fixes the problem.

Lately I have been having download failures that I'm not sure where the fault lies, but I suspect it's in my browser or operating system.

Not a big deal as a browser restart usually fixes it. At worst a computer reboot will do the trick.

I use Linux (Ubuntu 20.04 and, currently, Mozilla Firefox 136.0 (64-bit))