Problems when automatically uploading content from 4k Tokkit

To clarify my https://www.blackhatworld.com/seo/hi-all-looking-for-help-with-x-twitter.1677800/ (which was supposed to be an introduction post), my specific problem is as follows:

I'm trying to automate uploading content to various X profiles (mainly mp4 videos, but same problem occurs with jpg's). This content is downloaded from TIkTok, using 4k Tokkit. The problem is, when I launch a dolphin anty profile through my python script that uploads this content to X, I get the message "Some of your media failed to upload. Media type unrecognized".
The crux is;
- When I try to upload the exact same video downloaded from 4k Tokkit manually, there is no problem.
- When I try to automate uploading a different video, downloaded from another source (not 4k Tokkit, but downloaded manually from Google or Duckduckgo) the file uploads just fine.
- Sometimes even the files from 4k Tokkit do seem to work just fine with automation, but I don't know why it sometimes does work, and most times doesn't. I need consistency.

Any insight as to why this problem seems to occur only with videos downloaded from 4k Tokkit would be much appreciated.