low hanging fruit -- ancillary videos

[mjptak]

It would seem a simple and proper thing to have immediate links to a different voice around the same topic....take for example Basic Addition using Apricot instead of Avocados or maybe Gilbert Strang talking about Determinants as opposed to Sal Khan. For now one can get this same functionality by just hijacking a language in the dubbed video support and renaming some mp4 files but I'm sure there are better ways. The potential for quick local dubbing or commentary for key videos is incredible.

[bcipolli]

Actually, we could simply set up a new "language mapping", where the "language" would be "Gilbert Strang presents math", or could be "Alternate English Videos". Then, no youtube file renaming would need to happen; we'd just have to add the mappings between Sal youtube ids and alternate video ids to the appropriate place.