Please check that:
1. That the file names (archives and videos) do not have special characters (only letters without accents or numbers ).
2. The videos do not exceed the maximum size established in 2 GB.
3. That the files (documents: word, excel, ppt, pdf, etc.) do not exceed 30 MB in size.
4. That you have sufficient network access when uploading them.
5. That you have not disconnected halfway through the file upload process.