For most of the children, that will be at least two or three music lessons a week. The benefit of online lessons is that each student can find their own pace. A child who is having difficulty with a lesson can spend several days on it, while another child who masters a lesson quickly may be ready to move on sooner.

Some parents want to see a child completely master in a lesson before moving on to the next one. Children can move forward before they are able to play a song perfectly. They only need to continue to make that song part of their practice routine. Children need new material in order to stay fresh and engaged. They may become bored if they are being held back.
On the other hand, a child may want to watch the lessons several times in a single day. This is probably too much for a young, beginning student. For older students or those who already have some piano training, it is okay to go through lessons quickly at first. 
Keep two questions in mind when moving forward through the lessons at the right pace. The first is, Are we learning and making solid progress? The second is, Are we having fun and staying motivated? If the answer to both questions is yes, then you’re doing it right.
As a child watches a new lesson, it is best to do it near the piano or even at the piano. Throughout the lesson, there are times when students are asked to pause the video and practice. Make sure that the piano student takes the time to stop and play as instructed.
Right after viewing a lesson is a good time to spend a few more minutes practicing. For the next one or two days, the student can either watch the full lesson again and play along or practice as instructed or review the material by practicing on their own.
If the practice session proves difficult for any child, spend another day or two on it until they master it. When the student can complete each practice session task, not necessarily perfect but with confidence, you’ll know it’s time to move forward.