Several big films started Tuesday at the Venice Film Festival.

One was Alex Gibney's film "Musk."

It is almost four hours long.

It looks at the power of the richest man in the world.

Gibney said he liked Musk at first.

He hoped Musk would talk to him.

Musk did not talk to him.

Gibney said the facts changed his mind.

He said Musk is not like Leonardo da Vinci.

The film comes to North American theaters in October.

Another film was "Bunker."

Florian Zeller wrote and directed it.

Javier Bardem plays an architect.

He must design a bunker for a rich tech man.

Paul Dano plays that man.

Penélope Cruz plays Bardem's wife.

She asks him about the project.

Zeller said the film is about fear of the future.

It is also about unfairness between rich and poor.

He wrote it for Cruz and Bardem.

They have acted together many times.

Cruz said the film shows a real two-language home.

The family speaks Spanish at home.

They live in London.

She said people want to see this.

But money people were hard to convince until now.

Casey Affleck also showed his film "Company."

He directed it and wrote it with others.

It is about sadness and kindness.

It happens in winter 1975.

A strange woman comes to a holiday party.

Affleck said he answered to world fights and his own feelings.

The film is not about politics.

His children are in it.

He gave it to his parents.

They both died this year.

They never saw it.

"Company" is in the race for the Golden Lion.

The winners come on Saturday.