I'm interested in monophony and plainchant, i.e. songs that only have vocals and no instruments and feature only one melodic line. Recently I've watched a documentary about flamenco and discovered the term "cante primitivo", which is a form of flamenco "sine guitarra" - without a guitar accompaniment. After searching "cante primitivo" I discovered another documentary featuring a couple of artists who perform cante primitivo, but it's not the whole video I am interested in, just parts of it.

Have a look: https://youtu.be/OvYPB_1oPos?t=18m14s

So what I am going to do now is to record this piece on a Mac using QuickTime and SoundFlower, which allows me to capture any audio output. If I am lazy I'd record the entire video and later cut it into pieces with Audacity. The thing that this method is lacking is a way to keep notes about the sources, such as the address, performers' names etc.

I hope it helps (and enjoy the music :)