I hope you’re having a great day 🙂
First of all, sorry for being late to reply, we’re working on the PRO version of Premium Addons for Elementor 😉
I can see that you’re using a custom video link “http://brbfamily.com/wp-content/uploads/2018/06/tpishop-promo-2018.mp4” for the Premium Video Box widget. Using custom videos from a source other than Youtube or Vimeo can cause this issue, because Autoplay is compitable only with Youtube or Vimeo videos, you can upload your video on Youtube or Vimeo and put the Id or the URL in video Id/URL field.
If you still have any issues, suggestions or questions, please don’t hesitate to feed me back 🙂