A Cappella Academy Sample Audition Video  feat Avi from Pentatonix https://acappellacademy.org/apply/academyinfo/

Agapella singing Canon in D by Pachebel https://www.youtube.com/watch?v=Dn-fpMSi6tM  

This is the song "Canon in D" by the singing group "The Acappella Company" from their album "Acappella Classycal".

https://www.youtube.com/watch?v=Dn-fpMSi6tM

https://www.youtube.com/watch?v=zeLuY4gFTmQ