(Use the “Full screen” button on the video player to make it bigger)
The rhythm in measures 1-4 is difficult. I had to slow these four measures down and practice each hand separately. This part is used a lot throughout the song, so you want to learn it correctly the first time.
Look at the left hand going from measure 20 to 21. I found it easiest to play C-E with my pointer finger and thumb, and then to use those same two fingers to play C-G then D-A.
There are many fingerings you could use for the right hand part at measure 37-38. Play it a few times with different fingers and find something that feels comfortable to you.