I am checking to see if you have any videos, or films surrounding 1492 and the explorers- I am not sure as to where you have the videos you have
The library subscribes to a streaming video database, Films on Demand.
You can get to it from the library home page here: http://www2.ohlone.edu/org/library/
About half way down click on the link that says: Find Streaming Videos. From off campus you will be prompted for your 7 digit ID number and your last name. Do a keyword search on columbus.
There are a number of useful looking videos including: The Explorers: Five Europeans Who Redrew the Map of the World
All of the videos in Films on Demand are closed captioned.
Let me know if questions.