Q: just wondering what's the chord change at the end of your 'what is love?' video? (i.e. the 'hell yeah' one)
A: key is Bb, and i will tell you the notes.  on "hell," bass is F, melody is C. important harmony notes are Eb and Gb, less important is Bb (NOT A, A WOULD RUIN THIS).  and "yeah" is just Bb maj triad (Bb, D, F).  to express it in terms of chord symbols, you might accurately say F7sus4b9, or Ebmin6 over F, or Cdim (or half dim, NOT dim7) over F. all would be equally accurate. the important note that makes the magic happen is the Gb, and it is the same note that makes 4min chords happen. i hope that answers your question