Never been able to find a video converter that can handle as many web sites as this one.
True however that since the new versions (some 3 or 4 years ago) videos might be marked by a stamp in the top left corner when choosing a good quality (720p and above) video. Sad because sometimes it corrupts important details on the image.
However this is the best Vdnwloader I could find on a browser (no such thing under Brave or Opera for example).
**** (4 stars) for me.

Prima App, funktioniert einwandfrei!

Used to be a good add-on that downloaded videos. Now Video DownloadHelper will make you download a desktop application to install, only to put a giant watermark in the middle of every video you download. Pretty trashy.

Fonctionne très bien la plupart du temps, je recommande sans autre.

non sempre scarica i film fa perdere tempo poi non funziona poi non riesci piu a vederlo se lo reinstslli

Yıllardır bu eklentiyi kullandığım için mükemmel diyebilirim...

pretty good to just download a video from a random website (particularly youtube) without much issue. BUT they want SO BAD for you to get the "companion app", and if you're going to do that, get youtube-dl.

super

Up from four stars (mid 2018) to five after I discovered a workaround to a perceived problem with a BBC page:

https://groups.google.com/d/msg/video-downloadhelper-q-and-a/19wMTBXj4uA/5dv5ZUg-AQAJ

I could knock off a star for the troublesome 'Support site' link here, but honey works better than vinegar:

https://groups.google.com/d/msg/video-downloadhelper-q-and-a/-4FbylnAlEM/bK01fjwUAQAJ

Many of the one-star reviews here are misleading. Maybe from people who could not easily find relevant support.