I'm a new video editor and I was working on this little promo for work and when I listen to the promo with my editing headphones, or the computer speakers, or master control, everything sounds fine.
When I listen to it on a TV or my phone, though, a few sort of 'interview' shots sound way quieter and tinnier than everything else, and one in particular sounds really loud.
What causes this sound difference on TV's and phones while everything sounds perfect and level on my editing gear?