We use Both/Either/neither for two things:

1. Both Films are good


2. Neither film is bad


3. I don't mind seeing either film

Listen carefully to the video - Both of the earths Poles....

Both of ......is always followed by the/those/these......my/his/theirs

• we cannot say both of restaurants are good


• we say instead both of the restaurants are good.

Both.....and - means 'the one and also the other of two persons/things etc'.

• both things

Neither.......nor - used in sentences expressing negativity

• not this nor that

Either.........or - used in positive sentences expressing positivity

•  one or the other