Very easy to use. It detects videos in most video websites (sadly not all), including YouTube and Vimeo, and also video embeddings. It downloads videos in the background, so you can close the tab and not have to wait (although you gotta keep the Firefox app open at least). At the beggining I got confused where it was downloading stuff, but it's in C:/Users/MyUser/dwhelper . I've used it now for a few years.