I appreciate that you enjoyed the STAS choir of seminarians at Ordinations a few years back, but I must insist that your guess is wrong about this.
Just because they are both beautiful doesn't mean they are the same
This recording is not using the 1962 version of the Litany of the Saints.
The Litany of the Saints, in the traditional 1962 version in the Liber Usualis (which is the ONLY version used by the SSPX) is 16 minutes long when sung.http://www.chantcd.com/lyrics/litany_saints_latin.htm
Having only listened to 2 1/2 minutes, I can already tell it's not the same Litany:
"Gabriel et Raphael et Michael"
"Orate pro nobis"
There is NEVER a case of 3 saints listed like that.
Also, there are no Old Testament saints in the traditional Litany, and yet you hear
Ora pro nobis