Adding links and CTAs to your video is very important for achieving your goals.
Videos you publish in Promo come as downloadable files. Adding clickable links to native mp4 video file is not possible. The way to add these is in the video player.
When you upload your video to the specific player on YouTube, Vimeo, or Instagram, you can create and add embedded links through those specific video players.
Get all the help you need with adding a link on YouTube here:
When it comes to Facebook videos, you can add an embedded link to your video only if it falls under Facebook's guidelines for ads. You can learn more here.
On Twitter, you can also add a CTA to your video through their platform for your promoted tweets. Learn about it here.