I’m glad you were able to find a workable solution. When I began reading this topic, it seemed pretty clear early on that this was going to be a codec issue, because that’s been my experience in the past with microSD recordings from Wyze cameras. I don’t know the reasoning behind the choices Wyze made for the encodings of the audio and video streams it packages into the MP4s, but I haven’t been able to use VLC to concatenate them natively and have to tell FFmpeg to change the audio encoding in order to make that work.
Welcome to the Forum, @Chevelle, and thanks for sharing your experience! 