This has been going on for way too long lol. What Alkan said above makes sense and is pretty much true. Saves are seen as "free" believe it or not...just because he converted it so you can load it up in Roblox doesn't mean he stole it all of a sudden. Now however, the ONLY problem I had with Shedletsky using the save (even though it is free) was that he was essentially promoting a new feature on Roblox by using something created in another game.
I just find it a bit weird/wrong, if a rather large company uses something that doesn't pertain to their game to show off a feature, lets say they took a free map from Minecraft and made an identical map or "converted" to Roblox and then recorded in it to show off something new they were working on, doesn't that seem a little odd?