First, make sure you have access to the app or website where the person's story is posted. Then, navigate to their profile or story section. The video should be playable with a simple click or tap, depending on the interface.
Well, it depends on the platform. For instance, on social media apps like Instagram or Snapchat, you just need to find the person's story and look for the video icon. Click or hold it to start playing the video. Sometimes, you might need to have a stable internet connection for smooth playback.
You can usually do that by opening the relevant app or platform where the story is shared and looking for the video play option within the story.