That's okay. Thanks anyways.
Also,I just read over at gamefaqs that the US demo has the updated patch. Bosses can't be locked in Freeze/Burn/Poison etc.. easily anymore. The first time its X requirement to Poison/Sleep/Freeze etc...The second time, it will require more, the third even more, and so on.
So, probably the method in the video (from JP demo) doesn't work anymore.