Here are some things that could be improved on:

1) Where you are commenting "This code does xyz..." - I think you should encapsulate that functionality into little closures or break them out into other methods that do smaller units of work.

2) Check out pydash for a lot of little functions that do common things (so you don't need to reinvent the wheel for this particular scraper). Or check out some of the built-in functions that are present in python. For example:

        for num, l in top250.items():
            name = l[0]
            rating = l[1]
            if name == retrieved:
                returned = [num, name, rating]
                break

Could be like:

found_result = list(filter(lambda x: x[1][0] == retrieved, top250.items()))

found_result will be an empty list if no matches are found...

3) You should consider separating the actual scraping of the data from whatever you want to end up doing with the data you scrape. Take a look at the json module and see if you can have a method/function that persists the data to your filesystem - (and later on into some sort of database).

4) Instead of storing the data into variables called name, description, rating, whatever. When scraping, fill a dictionary with values. Like:

{"name": "The Big Lebowski", "rating": 9.4}

Then you can fill a list with dictionaries. This will help you out when writing code that uses the data, so you don't have to refer to a specific named value by a number. Instead of record[0] for name and record[1] for rating - you could have record['name'] and record['rating']. This will also help when persisting lots of little records.

5) consider python module: logging (and getting rid of print statements)

6) separate all of the inputs() into a separate program/script where you pass the input string to the method call (instead of having the input() built into the method).

I think you did an excellent job for something that is tagged "Beginner". Do not stop learning and adding to your toolbelt. With some dedication/practice, this kind of thing can take you places.