Never use how much fluid came out of a vehicle to judge how much to put back in. As stated there can be burn off, leakage, over filling, underfilling, etc. If you don't know how much it takes, you look it up. The manual should have a page dedicated to how much various fluids it takes.
With regards to the suction technique shown above, I suppose you could do it that way if you have the tools, and the space to store such tools when you are down with it.
Well... after looking the prices up, I found this pump, that I may get myself for it just being handy for various things.
12 Volt Oil Pump I can't speak to the quality, but it is about $100 less than many of the manual ones. (I'd just deal with the mess rather than hand pump a whole transmission worth of oil) The powered ones like you saw in the video are much more $. You would still need to drop the pan, but I can see the benefits of getting most of the oil out with a cheap pump like this.