Brand new? Get installer back to correct.

Videos cannot be uploaded directly into a post like a photo. Videos first must be placed at an online sharing service and linked into the post. The "Video" function below the composition directly supports YouTube and Vimeo (embeds the video into the post, the video's privacy settings must be set for public viewing). Use the "Link" function for other sharing services, which places a link into the post that opens when clicked to the sharing service's website to the view the video.

Being unlevel won't cause a rattle nor effect operation.