I've never used it, but I can see that there are certain advantages to using it in a conventional oven. If you're making no-knead bread as I do, often it's difficult transferring the somewhat amorphous loaf to your very hot Dutch oven. By using parchment paper, the process is simplified in that you simply lift the risen loaf by holding the edges of the parchment paper and drop it, paper and all into the Dutch oven. The paper will not burn. The video shows the whole process.
Note how the hot Dutch oven cover is dropped on the floor. Actually it's hard to miss, and maybe we should all take safety precautions by wearing steel-toed boots.