I am a senior high school parent. What do I say when my teacher asks me to send a video to my child to cheer me up for the college entrance examination?

As a parent of children, you can say this:

The college entrance examination is really a harvest, it contains too many connotations. No matter what your college entrance examination scores are, your growth and maturity are facts that no one can change. You have gained so much through these three years of hard work.

During this period, you are very motivated to study, focus on listening to lectures, and work more seriously. You are the pride of your parents! No matter what the final result is, you have worked hard and your parents will always be your solid backing.