NPR Music just published the end-of-year recap of their wonderful Tiny Desk Concert series.
http://www.npr.org/2014/12/16/371184887/2014-the-year-in-tiny-desk-concerts
If you aren’t already watching these, check out the concerts from this year, then go back through their archives and dig for gold. There’s a lot of it in their YouTube channel: https://www.youtube.com/playlist?list=PL1B627337ED6F55F0
My personal favorite:
