The MCU’s streaming home is on Disney+, which also features a number of X-Men movies with Hugh Jackman. You can use this link to sign up for the streaming service.
For those who might not have caught it, you can see the video in question below. It’s the most Deadpool way to join the MCU ever, with no pomp and circumstance. That is, until he finally gets the spotlight on the big screen or gets to interact with The Avengers.