(Edit it, find it, watch it, describe it?) I can give you more specific, tailored advice. How to Add Description Text to Your TikTok Video
If you need to ensure your files are in a widely supported format, you can use screen recording or specialized download tools (like the Chrome extension My Fave TT) to save content directly as MP4 files. Fresh Man 63.mp4
(Is it a music video, a lecture, a tutorial?) (Edit it, find it, watch it, describe it