The correct answer is the following.
You did not include the video or the link to the video. Without information, we do not know what you are referring to.
However, trying to help you with something, we can comment on the following general terms.
In some educational videos that refer to the topic of mouth hygiene, the idea that is constantly reinforced is that you could brush your teeth three times a day because is better.
And the logic behind that affirmation is that after you have your meals -in the morning, afternoon, and night- your teeth have food residues that need to be removed. That is why dentists recommend brushing your teeth and the use of rinse.
