Given the opportunity

[rainous]

Given the opportunity, ~
If given the opportunity, ~
When given the opportunity, ~

hi,

Do they all mean the same or are there slight differences in nuance?

I am especially curious about the first one.
Does it mean the opportunity is already given
or is it simply making a hypothesis just like the other two?

Thanks

[Rover_KE]

Complete sentences would be helpful.

We don't know how you want to use these expressions.

Rover

[rainous]

How about this for an example:

If given the opportunity, most people definitely would want to make their own movies.

Can I take out "if" or replace it with "when" without changing the meaning?

[bhaisahab]

How about this for an example:

If given the opportunity, most people definitely would want to make their own movies.

Can I take out "if" or replace it with "when" without changing the meaning?

If given the opportunity, most people would definitely want to make their own movies.
Given the opportunity, most people would definitely want to make their own movies.

These two have the same meaning. I wouldn't use "when".