The pixelation is just a visual effect. When redaction is on, the text content/images etc are not captured at all. During replay/playback the place where the original content was is filled with randomly generated data whixh is then pixelated.
I noticed that when typing in the email box nothing happens in the recording. I assume that this is to hide the email address but it would be nice to have some sort of visual cue (may be asterisks, like passwords?), otherwise it looks broken.
We are exploring other options with the right balance between minimizing information leak and usability.
Good luck with this.