Help Needed: Play Audio and Video later in scene

Hi, I am quite new to Hype moving away from Flash CC.
I would like to create a scene and have video played after - say 15 seconds. An audio file after 20 second, another video after 2min and so on. So far I did not find out how to do this. As soon as I place a video file - it is just here and starts playing (I need to Auto Start - but later).
Thanks for any help

To do this you would need to set Timeline Actions that play your media at a specified time on a timeline:

Audio can be played with an Audio action, but you’ll need to use JAvaScript to start your video. This topic has more info on how to do that: Creating Play & Pause Buttons for Video