If a brief requires two or more modules then you have to upload a video to both. If you are trying to upload just for one module then upload a blank short video for the other modules as a placeholder.
Ensure the Specs of your video are correct
1080:1920 [9:16] pixels aspect ratio & 1080:1080 [1:1] pixels aspect ratio
** These are the pixel tolerance for 9:16 & 1:1 (anything outside of the tolerance will not upload to the platform, please double-check this when submitting)
Saved as .MP4 & .GIF (For the gif modules)
Maximum file size of 4GB
Make sure the video length is under the specification listed in the brief