Please ignore the one star reviews. I've used this add-on for several years and it is a fantastic tool. For a nominal fee, it was well worth upgrading to the Pro version, which lets you generate mp3 and download HD quality mp4 files. Beware that there are periodic updates, after which it may be necessary to follow Dishita's instructions to re-enable the PRO features. I have had to do that a few times over the years, and had no problems continuing to use the add-on. The developer has been responsive when I sent questions about re-enabling the pro registration, but the information available on the web site is self-explanatory.