A decent tool. Works as stated. The UI is attractive and effective. Been using it daily for 4 years.

I don't pay for the pro service. That service uses an external server. I chose this tool specifically because I want to download without going through such a server.

The tool is unavoidably imperfect because it must defeat YouTube restrictions.

Without pro service, the tool can download almost all videos at 360p. Sometimes, it can download at 720p too (480p isn't an option). As far as I can tell, the tool loses the ability to download at 720p if a video is popular. This occurs somewhere above 100k views but sometimes you get lucky with a popular video. In the drop-down menu, if the tool doesn't display the video's file size, then it cannot download that video at that resolution. If you click it anyway, the tool goes through the motions but the file doesn't arrive.

A pro subscription provides access to an external server, which works around YouTube's encoding of higher resolutions.

Periodically, YouTube's website layout changes, causing the tool to cease working (the button disappears altogether or the dropdown menu lists no file sizes at either resolution, and downloads don't work). This cannot be helped, since YouTube has no desire to facilitate downloading. When YouTube changes (about once a year) we all simply wait for Dishita to code around the changes.

I appreciate the work that went into developing this add-on. Dishita, thank you for writing it and thank you and for maintaining it, as YouTube evolves.