Thanks for your response. The copyright shouldn’t be an issue (I believe) because they are the right owners and creators of the videos.
I’m not sure if they are willing to dish up a large sum of money for the project though. This definitely looks like a feasible option (although might require me to learn a bit more about how to secure the library). Given the fact that they may not be willing to dish up the money for this option, do you know of any other good alternatives?