

It also requires an app (like most decent video downloader extensions as already stated), but it appears on the installed applications menu (on windows at least), so it should be easy to uninstall if you don't like it later.

With that said, Video downloadhelper went freemium now, and you'd need to pay for some of the DASH video downloads (streaming), so you might want to try something like Ant Video Downloader, which recognizes same as many as video download helper as well as streaming sites.

These apps would have ffmpeg and youtube-dl embedded in them to merge the fragments of the stream that the webextension counterpart would send them. Most decent video downloader extensions will require some "app" to download from streaming sites, since webextensions are limited in capability.
