CLEAN : Greta Thunberg joins climate protest in Switzerland

The transcript includes a brief discussion about the necessity of walking, followed by a casual greeting and a mention of Blockbuster. It seems to be a light-hearted conversation with no specific educational content.

What do you think is meant by 'They say after Blockbuster.'?

In what context do you think the phrase 'They say after Blockbuster.' is used?