Watch the Slap Hi Hat online guitar lesson by Dmitry Lisenko from Percussive Acoustic Bass (Foundry)
We've played this beat already, so you should know it. This time it's just different hi hats. It's very important not to move your hand around, but keep it in position, and think about coordination.
After the kick, our thumb is already in place, we just have to rotate it, and after that we have to raise our finger to get enough amplitude to play a snare, and on our way back we are playing hi hat.
In the beginning your hand will be flying all over the place, a very common mistake. If you play like this, you won't be able to play fast and precise, you'll be wasting too much energy. Think about your right hand, start with a slow tempo, and gradually speed up!