Step 1 - Green: Add a new Video Object to the layout
Step 2 - Red: Upload your file (mp4 format with standard codec)
Step 3- Blue: Set the name to the name of the file you uploaded, for example fileName.mp4, it needs to have mp4 on the end
Make sure autoplay in properties is enabled
p.s. You can use the other 2 available video formats too, I just took an mp4 file as example. If you need to convert your file to one of the 3 formats, I recommend this site: online-convert.com