Loose running shoes and heel slippage?

So I got an awesome new pair of running shoes, their Adidas, by the way... I think in the end they won out after the fit and comfort test, (of course) because they say "Run Fast" on the inside... I mean who doesn't want that... to "Run Fast"  anyway... its not about the shoes... well it is....
I feel like the are loose... they slip a little when I run. Never fear... I stumbled upon this great little video about how to fix heel slippage here, genius.... I never could figure out why those holes so far back were used for.