Screencasting Software - ScreenFlow Overview - Telestream. Highest Quality Recording ScreenFlow has the best screen recording available – whether you are recording multiple screens at once, or using retina displays. Built in Stock Media Library Spice up your videos with access to over 500,000 unique images, audio & video clips and more directly from within your ScreenFlow projects. iOS Recording Record your iPhone or iPad screen for high quality app demos. KeepVid: Download and save any video from Youtube, Dailymotion,