First, find a solid object at your house. Example: table, chair, shelf, box, etc.
Then, make a video of you demonstrating on how to find the volume of the object. You may present the object first, then the formula to get the volume, then measure the width, height, length, etc... then you solving it, and finally you saying the answer.
For example, you chose a shelf as your object. Show the object. Then, tell the formula. Since its a rectangular prism, tell whatever formula you use to get volume of rectangular prism. Then show yourself solving it. Finally, show the answer.