Here is where i upload and link to video files that allow so that i can build video background pages.
Head over to any individual page and create a text block. In the text block, write a small amount of text, highlight it, then click the create link button. In that menu, click the menu item entitled Files. You then want to add a new file by clicking Add a File and selecting your mp4 video. It may take a few minutes to upload if you have a large file. Once the file is uploaded, you should be able to get your URL by selecting the video from the Existing tab for the link. Then, you can get the link by clicking the text that you entered, then right clicking to copy the Image URL.