Make sure your video fits the specifications listed in the article above. To change your video's specs, you can go into the render menu, select a render template (best to use one of the AVC codecs, like Magix AVC), select one of the internet templates that closest matches your source media, then customize the template if you need to adjust the bitrate or frame size to make the file conform to those specs. From what I can see, a 1080p template file should work as long as it is under 512MB. If file size is your issue, try a lower bitrate. Remember, variable bitrate will yield the best file size to quality ratio.

still cant get it to work