String Videos to watch:
Lindsey Stirling: Anything (violin- some with Dubstep) http://www.lindseystirling.com/videos/
The Piano Guys: Anything (Lots of cello and some piano) https://thepianoguys.com/videos/
2 Cellos: Thunderstruck (Rock!) https://www.youtube.com/watch?v=uT3SBzmDxGk
Pentatonix: Imagine Dragons https://www.youtube.com/watch?v=aE2GCa-_nyU