Play RTSP video stream when extension dialed

Is there a way I can get asterisk to play an h.264 video stream when an extension is dialed? Something like the below (doesn’t work)

exten => 103,1,NoOp(Playing video)
exten => 103,n,Answer()
exten => 103,n,Playback(rtsp://10.0.0.2:7447/58Afji880ppqiF)
exten => 103,n,hangup

There is no built in support for such a thing. Any support would come from something external.