[YouTube] Using Ayu Music for my YouTube

[kotora]

Hi, I have questions about using Ayu music for my youtube channel.

I really want to show some love to ayu and put a short clip (less than 30seconds) of ayu song at the end of my videos. This idea is for her 20th anniversary.

However, I don't want to get my video removed because I use the copyrighted material. So, my questions:

(1) If I put the clip less than 30 seconds and cut from her music videos, would that be ok? I will provide credit and link back to her channel and ave

(2) What is the worst situation?