I haven't even watch the vid yet (I'll get around to it, but I want address a few things in this topic)
Dthrow > Bthrow. Deals more damage I think, has less lag I know.
Secondly, Dtilt is a good edgeguard if your opponent doesn't sweetspot the ledge. It hits them at a very favorable trajectory.
Third -> I used to never do this, but Down Dancing Blade is awesome:
A) If the spacing is right
B) If your opponent is spot dodging
C) If your opponent is shielding
D) As an edgeguard (OMG I just now remembered that I found out it hits you off the ledge months ago. I need to start using this again. Use it as an edgeguard sparingly.)
If your Dancing Blade comes out clean, then use the Forward ending to toss your opponent to start up the edgeguard. At low percentages, use the Up ending to start juggling some characters, and if it's not stale, at high percentages, use the Up ending to finish on stages that don't have retardedly high ceilings (coughcoughJungleJapescoughcough).
PROTIP: If you're having a difficult time finishing your opponent, grab them and start grab hitting the crap outta them until they break out. At high percentages, this should replenish your moveset fairly decently. It might even let you get an EASY kill with a normally stale Dancing Blade, EVEN with the forward variation.