This is a great classic video The Ultimate Freedom Yoga filmed in 1976 from BKYS Iyengar . A black and white film that is quite grainy but the content is very good.
The video starts ” You all read the title of the film the ultimate freedom. ultimate freedom means complete freedom in body, in mind and in the self itself. In order to experience this total freedom Indian sages and saitns introduce the subject called yoga. Yoga is a union of the body, the mind, the mind with the soul, so that this ????? of man are brought together so he lives in the stare of poise. Yoga is a means for freedom and is the ying in freedom itself.
It is worth a watch for all those that are interested in gaining more knowledge. BKS is the master of alignment and the body mind connection.