The Steam OS is a Debian Linux based operating system primarily used for gaming. The product you refer to is a little confusing. You first refer to Mobile Movie Creator, then ask about testing Movie Edit... Even if it did run on Debian Linux, why would anyone want to capture video from a gaming system on a mobile device? As Carl suggested, most Magix products run on the Windows OS, some are available on MAC but I have never seen one that was compatible with Linux let alone the Debian version of Linux. If by "some codes" you mean access to source code, you definitely will not get it here, or are you likely to get it from Magix although you could try writing to Magix support. I think that you may be way too involved in the Linux open source phenomena and your flavor of choice is Debian?...Red Hat maybe, but Debian, I don't know. As Carl suggests, see if Debian has a Windows emulator (which I seriously doubt) then if it is any good you should be able to run pretty much any windows based application.
ps, I could not get your youtube video to play so I have no idea what it was about.