Of course, there's always something that comes up with this software. There's absolutely nothing wrong in the settings. The file just decides to export without any video. I've tried VLC and Movies & TV. All it does is play the audio of the MP4 video files. The original video files were MP4 too. This is just dumb...I tried AVI. I tried matching the original sequence settings. I tried exporting other projects as well, and now, they're exporting without video--only audio. What's going on here???
Did you try a simple new project. Import in one video clip, drop it in the timeline, and export out using a plain h.264 format. See if you get some video. Don't change any settings. What's your hardware look like, you likely don't need Use Max Render Qual.