about the k/da music video and also rise

I was wondering how much time did it take to create those kind of animation??? because i realy can't stop watching them...even jinx odissey trailer is amazing!!

is it even possible to create the same thing alone but with no sound?

btw the Story art & sound part of this game is realy amazing!! i have to congratulate you for all of your hard work...the game doesn't do you justice clearly.