Today that's what we're talking about.
Random Fact: Did you know 'capo' also means a mafia boss? Ok... back to guitar.
So the rule of thumb that I get into in the video is basically this:
If you move the capo UP X number of frets, you need to transpose your guitar chords DOWN by the same number of semitones. Follow that? Each fret is a semitone, right? so in order to maintain the balance, if you go up with the capo, you need to go down with your open chords.
This might be a bit confusing, but keep in mind you're not actually changing keys. The only sense in which you're changing keys is in that you're changing to the open chord formations of a particular key. The whole idea is to remain in the same key right?
Hopefully that becomes more clear in the video. Any questions... you know what to do.