Hey there, @Jeff_Dobrow 
Totally get that making all adjustments directly through Wix feels more convenient. But as you pointed out, having access to additional features - like the ability to add filter attributes via the widget’s code - is a big plus of using the Elfsight dashboard.
There are a few other benefits too, like being able to track widget updates in the What’s New section and stay in the loop with major company announcements. I hope you’ll enjoy this experience 
As for the videos, unfortunately, it’s impossible to add them to the event cards now. I’ve added this idea to the Wishlist and if it gets more votes, we’ll try to think about it - Add videos to the events instead of images