I think Manuel knows _how_ to download youtube videos (youtube-dl for example). The point is that youtube does not _allow_ this. Check the youtube terms of use [1] section 5 paragraph B.
@manuel, forgive me for taking your quest to download the videos literal. I get it now. YouTube doesn't permit that.
Nkansah, you dismiss commons and its "upload wizzard" yet you seem not to have followed the advice to use the tool labs video converter/uploader. I've used it before, it is painless.
I don't remember ever 'dismissing' the upload wizard in general. It simply _doesn't work_ when uploading videos. For pictures, from my uploads experience throughout last year, I'll give the upload wizard 10 out of 10.
In that light I find the anti-commons soapboxing rather annoying.
What is soapboxing? I haven't tried the uploaded convertor yet. I was more concerned about using a tool I _know_ it works, before later on, trying a tool I'm _told_ it works.
I've tried enough dealing with Commons upload for some time, and I wished to save my remaining time on something that I'm sure it'll work 100.00% all the time.
The video upload convert tool on wmflab, likely is exactly what I need(ed), however I wished it was easy to find. Just recently that it was added to the How to Upload to Wikimedia Commons section, whereas there were ffmpeg commands there already.
Short story: I'll give the video upload tool a try soon. For now, I say my work is done, and unfortunately, Commons didn't make it.