Some (but not all) educational/documentary videos may be available for permanent/long-term campus streaming. These licenses usually cost between $300 and $1000 per video title, with most between $500 to $700.
Note: Commercial films / motion pictures are only very rarely available for permanent access.
The following are some of the major documentary/educational video producers who often offer a perpetual or "life of file" license for their films:
Educational Streaming Video Vendors with Perpetual Rights
Other Streaming Vendors
The following services sell licenses for videos from many producers/distributors. Some of their videos may have perpetual access purchase options available.