I finally found it!
I found this title available from http://www.ebay.com/itm/Proc-Why-DVD-1987-sport-drama-directed-by-Karel-Smyczek-CZ-language-/141242019484?hash=item20e2ae2e9c
this dvd is also available from czechmovie.com
http://czechmovie.com/d/proc-why-dvd-1000191/