(Use the “Full screen” button on the video player to make it bigger)
If a note has a dot above it, or below it, that tells you to “make the note short and detached.” These types of short notes are called staccato notes. For the introduction, as well as the section at measure 4, the left hand notes should all be short.
At measure 13, when you play the octave C’s in the left hand, make sure the low C’s are the louder of the two. The low C’s should be strong, that’s why I gave them accent marks. The higher C’s that are off the beat shouldn’t be as accented. It might take some practice to strengthen your left hand pinky.
In measure 61, don’t let the higher right hand part mess you up. The notes are exactly the same as the other sections, I just moved the right hand up one octave.