so may chance pala na yung may ari/publisher ng mas popular song ang may right to take full monetization control of the video. so parang wala ding kasiguraduhan.Kita ko lang:
Verification of Multiple Music Tracks in a Single YouTube Short
Content ID handles multiple matches, but monetization may be limited
If multiple copyrighted tracks are detected, each will generate their own claim, and the rights holders can monetize or take other actions. However, YouTube generally doesn’t split ad revenue equally between multiple copyright holders.

<3