"Mr. Protagonist, we found this video message that your late archnemesis left for you to watch in the event of his death."
"No! I won't watch it! I hate him!"
"But Mr. Protagonist, this message might hold vital information that could help you in some way!"
"How do you figure? I hated him, he hated me. Every second he had on screen was either an attempt at killing me or gloating about being about to kill me."
"But Mr. Protagonist..."
"Ugh, fine, I'll watch his stupid video."
"Huzzah! It is almost certainly pertinent information about some new threat to the city, or a revelation about why he did the terrible things he did that will utterly change the way we view his character!"
The message is actually a picture still of the villain flipping the bird at the camera.
"What did I tell you?"