Are we living in or otherwise part of some type of Simulation or video game run by a computer, what are your thoughts?
No we are living not, we are living in a free world. If you don'tv believe in free will try and change your habits. For example, you don't like to eat fish, order fish next time for dinner. Life is crazy and real.
A computer program could be made in which we could have what we perceive as free will.
Look at things like Alpha Zero, that thing figured out how to play Chess and Go!
Computers are amazing.
If nothing else its at least good fun to think about.
While I agree with you that computer programs are super effective these days and can easily bear a human, we would need a huge system to simulate the whole world history. Free will might be not true and we all just follow an algorithm. But why get up in the morning then? What if we all decide on one day this year where we are going to remain in bed? The whole world would stop for one single day, it would be chaos and mayhem but controlled by us. I really hope we are not in a simulation.