The video in question comes from the archives of Radio-Canada, Canada's national French language media, and shows a Pontifical Low Mass celebrated in the studios of Radio-Canada, with congregation, on the 25th of September, 1960. The Mass was celebrated by Mgr. Émilien Frenette, bishop of Saint-Jérôme.
It should be of particular interest to those concerned with the study of the Liturgical Movement and the relationship of certain streams of that movement with post-conciliar liturgical practice.
The video cannot be embedded, so please view it here: Une messe en latin (Double clicking upon the black video window will launch the video)