The video is a copy of two films made of Professor Cheng Man-ch'ing's T'ai Chi Ch'uan. I don't believe it is ever going to be available through standard distribution channels, but you can order it directly from:
Cho San Inc.
128 Cisco Road
Asheville, NC 28805
Cost is $65 plus shipping, which is about $6.
Cho San has had a reputation for being very slow and unresponsive to inquiries. I think, however, that everyone who has ordered from them has eventually gotten their tape. In any event, the address shown above is a new one for the company and, hopefully, will not have the problems some have encountered before.