It looks like a real PayPal feature they're abusing by inserting their phishing message into a generic message field. They're aiming to get you to call that number
I was thinking it would be a video counting from 0 to 1 million or whatever. Combined with a service to redirect you to the video at the correct timestamp using YouTube's "t=1m23s" parameter.
But 10 hours of video with 1s timestamp parameter resolution would only get you up to 36000
No compromised cert needed