There was one particular video that I have been attempting to download for ages, but none of the various different solutions and products that I tried would work.

But I finally managed to get the video today when I tried Video DownloadHelper (although I did have to also install the Windows co-App because the Browser method failed).

The extension is simple to use and it has very clearly-worded messages that make it easy to understand what's going on and why. It's also unobtrusive and nicely designed (not ugly like so many other extensions) as well as having a useful set of configuration options.

This is a very handy tool to keep in reserve.