Okay, say for this YouTuber...
http://m.youtube.com/user/osirislightandsound

Is it possible to just grab the audio at 44100 kHz, 128 Kbps and not even bother with the video?

Looking through the youtube-dl-x options, it seems like it can only be done after downloading it in full and then doing some post-processing on it afterwards which isn't supported because we don't have ffmeg and ffprobe compiled.

Is this correct?

Thanks ahead as always.