Installation of Manim tutorial by Theorem of Beethoven

Hello everyone,
I finished the different step to use manim and i use the tutorial of the channel i put in the title. Great Thanks because i finished all the steps, except the last 2 example when i try the 2 commands :
python -m manim examples_scenes.py SquareTocircle -pl
and python - m manim example_scenes.py WriteStuff -pl
I have not the 2 vieos like at the end of this tutorial
https://www.youtube.com/watch?v=ZltiKHFWmv8&list=PL2B6OzTsMUrwo4hA3BBfS7ZR34K361Z8F&index=4
11:30 and 12:09
Do i make a mistake? Because i dont want to continue if there is a problem in this step

thank you