We need more information about the problem.
Could you send us the original file and the Bandicut log.
The below link will be helpful:https://www.bandicam.com/bandicut-video ... /faq/tech/
If you want to send more than 25MB, you have to use a storage service such as Dropbox, Google Drive, and so on.
We look forward to hearing from you.
The Bandicut Team.