Get subscribers, not viewers.
Viewers come, watch, maybe share — and you have no way to reach out to them ever again.
Get them to subscribe to a video channel instead. 1.) Create a proper channel on YouTube or Vimeo (it’s easy), and 2.) Ask for a subscribe in every single video.
What happens? Your one-time viewer will get notified every time you add a new video — which gives you a huge head start. Over time, it grows and grows. And one day, your “instant hit” goes viral because you already have a huge base of fans to share it with.
Here’s a great example (watch how they ask for a subscribe at the end of the video):