Speak of the Devil

The video tutorial explains the phrase 'speak of the devil', its historical origins, and its modern usage. Initially, it was considered bad luck to mention the devil by name, but today it simply refers to someone appearing just as they are being talked about. The video also includes a conversation about a surprise movie plan.

How has the meaning of the phrase 'speak of the devil' evolved from the 16th century to today?

What was the surprise that the speaker was confirming with friends?