Consider getting an New York Public Library (NYPL) library card if you don’t already have one. Anyone who lives or goes to school in New York State is eligible for a card, which you can get in person at any library branch.
With an NYPL card, you get free access to online tutorials on Lynda (click the connect to database link).
Examples of Lynda courses include Python: Data Analysis (2015). Course videos are short, and all courses include downloadable course materials.
For talks and documentaries about technology, check out Films on Demand — these videos might serve to show applications of what you're learning in class. (If you are teaching a course, these videos are probably most useful as a discussion starter or a refreshing change of pace, especially in an online course.)
Examples: