I see a few things wrong with the video in general. First, all the video really had to offer was IC and DDD chain grabbing. The shots with Luigi were terrible, because clearly the Luigi doesnt know how to use his down-B (plenty of reasons why to use that there, don't feel like explaining them). The shiek tilt combo...well yea its shiek...what did you expect? So take out the chain grab vids and the terrible Luigi player and all you have is the shiek tilt combo.
As far as the whole "Dial-a-combo" discussion goes, if chain grabbing is your only proof (talking to the guy who made the video) of "Dial-a-Combo" in brawl, then you have a weak case. I personally am not taking sides in this whole debate, because I <3 both games, but if someone wants to bash a game, bring better proof.
Edit: I'm a Luigi player and I have easily gotten out of DDD chain grabs and that olimar corner combo before by simply using the down-b attack as a defence... its not that difficult