Can I use the videos marked as "youtube standard license" for a non profit video? I'm creating a video for my institution.

It's a scientific institution, so I suppose that the video can be considered no-profit (we don't make it to sell our products but to show our scientific project).

I already searched around for explanations about the youtube standard license, but it seems there is not much clear information on that: only vague posts ( google groups or yahoo answers ) in which there is not a clear reference to the term of use (which I'm not able to read as I'm not a lawyer), while there is much documentation on the CC BY license.

So my questions are:


can I use the videos marked as "youtube standard license" for this video, of course citing the source?
In case I can't, do you know any other place where I can take video I can use for this non commercial purpose of makning a scientific video to show the project?
I know you probably already found this link, but according to Yahoo, you will want to contact the Uploader before you try to use it. Thats what I would try. I don't think I would want my youtube videos just used by anyone who wanted to. Seems this person ran into that problem.

If a video is only using the Creative Commons License you may use it, but otherwise contact the YouTube user before you use it.

Good luck.