the 2 minute video is for using excel to make a graph. (its actually 2:36)
https://www.youtube.com/watch?v=3PwVWX28dEE
here is the video on the Scott Saterlee method. its from an episode of the "6.5 Guys". There are starting to be more videos out there on this method, but this is the guy who invented it.
https://www.youtube.com/watch?v=ACyfeeBHVOA
it does require you to have a chronograph, but if you are getting this far into reloading, then you should already have one.
above all else though, KEEP GOOD RECORDS! you will thank yourself later (maybe years and years later). i record velocities for different primers, different case brands, crimped vs non-crimped, everything. i prefer the Redding load sheets and i also use the little Redding labels to put into my boxes of ammo after they are loaded. its easier and cheaper then buying the sticker ones. when you do your different charge weights, take a sharpie and write on the case what they are. it comes off easily with some 0000 steel wool and will help you verify you are shooting the correct charge weight for what you are recording.
if you have more questions on this method, just ask. I have been doing this for a while now and feel i have a pretty good handle on it.
maybe i should do a post on the Saterlee method. i have been getting a lot of questions about it and it isn't too widely know yet.