Can I use LoL Music for BG Music?

This is more of a post hoping a Rioter could answer to see if I could use League of Legends music for background music for my YouTube and without getting copyright strikes, since I would like to start creating speedart videos [that some will be LoL related mainly chibis of champions and most being will be random stuff completely original and fanart], but they will be bland without any music in the background. Also a side question; Would Champions by Imagine Dragons be under copyright?

~ Stacona