BKS Iyengar gives insight into the practice of backbends
INTERVIEW WITH B.K.S. IYENGAR ON BACKBENDS 12/5/91 Questions asked by Victor Oppenheimer and Patricia Walden
These questions were asked during the teachers’ backbend intensive Mr. Iyengar taught in November-December, 1991. This intensive was videotaped, and some of the questions refer to the videotapes. The interview was transcribed and edited by Francie Ricks.
Read the interview

Dear one, I am a Iyengar yoga student and Hatha yoga teacher and I would love to see the videos where Iyengar taught the backbends..would that be possible??, Thanks, Oihana Galor-Dualxx
They are available on You tube
Menuhin gave him the break that transformed Iyengar from a comparatively obscure Indian yoga teacher into an international guru.
Yes, Guruji was very grateful to Mr Menuhin who remained his devoted student until his death. The famous performer credited Mr Iyengar as his “greatest violin teacher”.