A video explaining the benefits of visual regression testing, how Percy adds a visual review and approval service, and integrates with GitHub pull requests.
A video about PhantomCSS
Meetup recording of presentation on WebdriverIO's visual regression testing suite
Live coding session going through wdio-screenshot and blink-diff
A livestream recording going through the various versions of WebdriverCSS and WebdriverIO
Live screencast going through the Visual Regression service in WebdriverIO