Why do I get the error 'error_msg': 'PERMISSION_DENIED: Key: error.movie.permissionDenied' when calling the video.update method?

Question

Classmates

I'm trying to upload a video to a group.
First, I call the video.getUploadUrl method .
Then, I upload the video to the received url.
Then, in the third step, to complete the download, I try to accept the agreement by using the video.update method .
As a result of the request, the following response is returned to me:
{'error_code': 10, 'error_msg': 'PERMISSION_DENIED : Key: error.movie.permissionDenied', 'error_data': None} The application has VIDEO_CONTENT
rights .