Note: you must be on Sendspark Pro or a higher plan to use Video CTAs.
Follow these steps to add a button to your video:
Toggle on the Call-to-Action field
Write your desired button text (ex: Get Started Free)
Add the URL you want to send viewers to (ex: https://sendspark.com)
You'll be able to check that everything looks good in the preview area on the right of your page 👍