How to create an app

Question

How would I even start creating an app like YouTube? Is it possible with only python.

Answer 1

generally yes, but you will need some other technologies as well:
- html + jinja2
- css
- some javascript / typescript
- database

python is really good for backend, specially FastAPI with async; but django is very great as well.
flask is for smaller apps. as you mentions yt, flask is not enough