The sound fidelity is too muddy for me to make out what they are saying BUT... here is a technique I use often when trying to find info on an old or obscure song I know nothing about other than it is familiar in the windmills of my mind. To wit:
Pull out a sentence or any confluence of words, the more the better, and run then through a normal Yahoo or Google search. It is unlikely that that specific confluence of words will occur anywhere else, or precious few other places, except as the lyrics of that song. Then just follow the links to the song. The details of performer, composer etc should shake out.
In the event the words are sort of mundane and generate too many spurious returns throw in search terms like "Song" or "1971" or something else that might help hone it down