How Do I Add a Video In Keynote and Simultaneously Have Text / Object Appear?

So here’s what I’m trying to do … I’m trying to insert a video in Keynote of someone explaining a concept placing the video say on the left hand of the slide while at the same time have some texts or objects appear on the right that which I would synchronize there appearance to this person’s talk. Is this even possible? Thx to all!
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Carlos Rivera