Based on a free package and 20GB of storage you should be able to store up to 20.000 Images that are under 1MB in size.

If images are less than 500kb you should be able to store up to 40.000.

When we talk about video it depends but for example if we take that average music video is about 100mb it would mean you can store up to 2.000 5min videos (unless you uploaded 5gb version) :)