audio makes more sense than video

Given that audio recording and production is less expensive than 
video production, and audio takes less bandwidth, how about audio 
recordings as an alternative?

Whether we use GSM 06.10 or MP3 format, it makes economic sense.

Lincoln D. Stein suggests MP3:

  http://www.itknowledge.com/tpj/feature/tpj0503-0002.html

  http://www.mp3dev.org/mp3

  http://www.sfs.nphil.uni-tuebingen.de/~hipp/mpg123.html

Since this would be for noncommercial use for the IETF, no patent 
licensing would be required.  Commercial concerns would be free 
to pay non-profit organizations to convert the format for them.

Cheers,
James