Well, first off, the music for the video I mentoned was taken directly from the first trailer of 'ST:Excalibur'. Also, Lord Bile wasn't credited for his Charleston model. The whole battle sequence from one of the videos was taken from the fan film 'Star Wreck: In The Pirkinging'. And, the maker of the videos is attempting to pass off ST: Bridge Commander as a fan made simulation. That in itself is probably grounds for legal acts by Totally Games.
Need I go on?
Not one of any of the mods or video seen in any of those YouTube clips has received credit for their original creators.