We are sorry for the inconvenience caused. I would like to know whether the screen rotation option is working when you are viewing the video in your device storage or when you are viewing the video on any social media platforms.
If Yes, I would request you to move all the photos and videos in your McAfee vault to your device storage, reinstall the McAfee application, move back the media files to McAfee vault and check if is working.
If No, make sure the rotation option is enabled on the device settings or change the settings option by contacting your device manufacturer.
Please let us know, if the issue still persist.