In this piece, I think it's really important to incorporate rubato. The rhythm in the right hand (from 0:02 to 0:07) is repeating over and over. It gets predictable and tiring after a few repetitions of the same rhythm. Here you have a grouping of 7 notes going "up", and then 2 notes going "down". Keep slightly varying the time delay between these two sections of the phrase. This creates a call-and-response like feel. Think about longer phrases. For example, after every 4 or 8 smaller phrases, you can either slightly increase or decrease the time delay between the two sections of the phrase. This will maintain interest. Otherwise, the music grows stale after about 4 or 5 repetitions of the same rhythm in the right hand.
In addition, you should experiment with rubato and varying the rhythm, according to what you want to convey. A good rule of thumb is that not more than two repetitions should sound exactly the same.
I looked it up on youtube, and found the video below. Observe for example, how she plays the same phrase from 0:02-0:06, and 1:44-1:47. Notice how the last note of the phrase at 0:06 fades out, but the last note of the phrase at 1:47 is left ringing. These are the kind of things that maintain interest, and create a narrative for the piece. Unfortunately, you will usually not find them written out in the sheet music, so you will need to use your own ears.