I am new to WF. I am trying to put a blur with transparent letters over my video background. I created the background image in sketchapp. It is a png file with transparent typography.
You’ll likely want to use After Effects for this as blur still doesn’t have fantastic cross-browser support. In other words, create the effect in the video, render it with the desired effect, then upload that video. It’s FAR less processor intensive and it’ll have cross-browser compatibility.