hotspots, appearance and duration

1. how do I get a hotspot to appear for more than a second? (My vr video is about 20 seconds)

2. when I publish the hotspot it appears as just a black square, why?

3. Can I get the video to autoplay? Even more annoyingly, the second slide autoplays for a second and then stops. The first slide won’t autoplay at all. It would be important for them both to autoplay and not stop until the end

Thank you

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