The larger point is that since none of us work for the TPS' forensic recovery unit (or whatever it might be called), none of us can say with any certainty how long it should or should not have taken. I highly doubt they started searching the hard drives the second they came in - not to mention that upon collecting the evidence they probably aren't getting orders to "find the crack video! find it now!" - their chief concern, most likely, is documenting/filing/recording *anything* incriminating. Getting the video was likely a part of that long and diligent process.
But hey, you could also say that since it didn't happen the way you think it should happen (based, probably, upon what you see on TV and in movies), it's clearly a sign that they're incompetent.