The real problem here is that video messages expose a huge attack surface to bad actors, very little of which has been security audited. Automatically parsing

The real problem here is that video messages expose a huge attack surface to bad actors, very little of which has been security audited. Automatically parsing videos before the user even chooses to interact with them makes it even worse - although I suspect most people would play a video sent to them over MMS even if it came from an unknown contact.