From my own experience, this IS the best YouTube video downloader, so far, there are no other competitors. It is simple, functional and practical. From download to conversion every feature runs perfectly. Lately there was an issue with some downloads (my assumption, that it might have been due to the owners of Youtube), but soon enough an update was provided and fixed it, demonstrating the care, affection, and professionalism users get from the developer. Simply, I recommend this add-on as a MUST, above all other video downloaders.