Here we look at how we might animate video on a web page so as to create a fast interactive presentation of speakers and content during a Zoom Video Confernence - one-tab.com 
In general fast video manipulation looks possible within the browser using the HTML5 <video> element and the HTML5 canvas element.
Another option would be to use Cytoscape for the animations and then switch to video somehow.
In general we are looking to create a Deliberative App or dAPP
# Animating HTML5 Video