(The video teaches an alternative way to play some of the chords on the chart below)
Music theory can be scary. For pianist. For a guitar player, even knowing a little theory can go a long way and it is not as scary as people think. One of the most important things to know is that music has 12 notes and that E stays next to F and B stays next to C. All other notes let another note ( a flat or a sharp) in between.
The chart above shows the standard chord progression according to music theory. Play through the chords and you will feel the natural movement from beginning to end.
W for Whole Step and H for Half Step. A whole step is when you jump a note and a half step is when you go to the next note.
This equation is very important: W-W-H-W-W-W-H
If you learn nothing else about music theory, this would be enough. This equations not only allows you to find the root notes of the 7 chords in the pictured progression, but it also applies to your scale playing as well!
When you are playing through a diatonic (7-note) scale like the ones found here, you are also playing the notes according to this W-W-H-W-W-W-H pattern.
Just keep that knowledge in your pocket for now and click to the next theory lesson!