If you have a video on your site that you want to replace by another video, you can! This is also easy to change with Clonable.
Just go to the video you want to replace on your website. Check the source code (HTML) of the movie, by inspecting it with a right mouse click. Then paste the accompanying piece of code into the left column in the substitution rules in Clonable. In the right column you paste the same piece of code but this time you change the filename of the movie into the filename of the replacement video.