audio out of sync

Hi, We created a trailer for our upcoming film using Davinci Resolve Studio 2.0 v 20.3.1 Build 6. The mp4 (and mov) file plays perfectly on my computer (no out of sync issues). We upload the file to our YouTube channel, and that uploaded video plays fine as well on my Windows computer using...

The Problem: So if you've read any of my other threads that I posted in this section, it's probably me ranting about how bad premiere pro is for the price, because of one simple issue. When I watch a video out of premiere the audio is 100% in sync. However, once I import it and watch it in...