Steve Grisetti wrote on 7/22/2020, 7:13 AM

Open one of the videos from your DSLR in the free download MediaInfo. In MediaInfo, set View to Text and then copy the text of this report and paste it to this forum. Once we know the complete specs of your movie file we'll better be able to advise you.

And of course this is assuming that audio you've added to your project from other sources does not have this same issue on the right channel.