Upload the mobile version of the image or video into the media library in the same format as other files and publish under English (Australia)
Media guide for mobile hero images
Standard Hero (Magazine) - 375 width x 812 height
Collage Hero (Trip Idea) - 375 width x 500 height
Icon Header Hero (Destination/Attractions) - 375 width x 500 height
2. Click on the original version of your image/video in the media library
3. Scroll down to the mobile image field (images) or the mobile movie field (videos)
4. For images select browse image and choose your uploaded mobile image
5. For videos use the drop down to select your mobile version
6. Publish the image or video file as normal to English (Australia)
7. Check the mobile variant is puling through on your published page on mobile view