Export 1hour long video, is 24 bytes

        MForceX states:  "Exporting in quicktime has basically never given me any errrors, so I just do that and re-export in MP4."  Doesn't re-exporting in MP4 reduce the video  quality?

Okay, so this might help someone.

I'm sure the error is a bug
In my case clearing my storage didn't help, and I didn't think to check online initially.

I instead changed my export option from H.264 to QuickTime and exported as MOV with very high-quality settings because I had enough space, then I just threw the export back and re-exported in mp4, in less than a minute(depending on the length of the video)

I've also had issues where Premiere crashed at the point of packing the video into the MP4 container, thats basically 100% during exporting. Exporting in quicktime has basically never given me any errrors, so I just do that and re-export in MP4

Easy peasy ... squeasy

Я решил проблему так: вставил внешний жесткий диск и туда экпортировал все видео, и весят они как должны и открываются

I had the same issue, but if i choose to export to other folder instead of the same folder, the video can successfully exported and viewable, so hope this can solve your problem~

Got exactly same issue. My work deadline got missed because of this bug, not only that i've been on it for 9 months.

New project with Davinci, only option. Enormous hours to waste 🙂

[Profanity removed by moderator]

I created a new folder in my C:\ drive.
Export in C:\AdobeExport\ fixed the issue for me, my export folder had a "é" letter in its name.

In my case disk space didn't do any diffrence but I solved this problem by changing in render parameters -> video tab -> encoding options:  switch off option - encode with GPU Accelerated Rendering. Render only on CPU take even less time and no problem with export....  I have RTX 3060 and in Meida Encoder 23.1

Make sure that file/folder name does not have special characters.

I don't think this works for everyone but the solution for me was finally that the file structure aren't allowed to contain any of the letters å ä ö. 

I had this problem. My 2,5 hour video had an estimated size of 12GB but the file was 24 bytes. I had nearly 1TB space left in my drive. Even when I tried to export just one minute of the video, the file was still 24 bytes and didn't work.

I finally solved the problem by exporting the video to another external hard drive that had 4,5TB left. Video was succesfully exported.