Hi Adam
I can't list pro's & cons because I would be accused of being biased, I think Videobox is the greatest invention since condoms lol
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but I can clear up a couple of things in your question...
Videobox doesn't 'get' videos from anywhere, it plays the videos that 'you' provide (just like your music tracks), as for copyright, again its just the same as the music tracks you are currently playing
everything is copyrighted.
If you ask other members they may be able to tell you where they get their music & videos from.
Hope that helps
Steve
If any other members can help Adam with some pro's & cons that would be great