I have nothing to do with that channel - I run @JewishAlternativeMusic. They merely reposted it.
I'm not particular with copying music, but every song on my playlist - both this years and last - was released as a free single and/or has the artists permission. Shmuely Ungar's Shabbos was supposed to be on it but was left out for that reason. Mach A Bracha is on becuase it was released as a music video.