Launch From Buttons & Links
Buttons and links are fair game too, since the method uses anchor tags.
Auto-play is disabled for certain interaction paradigms, and on certain OS's—Like most touch screen devices that are behaving according to spec. The trade-off here is the user will need to tap the play button once the modal pops on touch-screen devices like iPhones. Depending on your use-case and project that trade-off is likely acceptable.