How to increase the size of attachment

Summary:

Business requirement is to add a video in a negotiation that would at least be 7.5 GB in size. I tried in the profile option (FND_FILE_UPLOAD_MAX_SIZE) to change the size but the field is greyed out.

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

25B

Code Snippet (add any code snippets that support your topic, if applicable):