I have bought the premium version to make it easier and more proficient hovewer there is no big difference vs the free version. The biggest disapppointment was that in the paid version there is no bulk download: no possible to use csv file, no way to autamate the process.
Also quite often it doesn't recogniese media file (sometimes the mozilla exetnsion says there is no media while you are able to download it on the chrome extension).
Recently it stopped recongizing the YB videos too. No point for buying the pro version.