It can take 5 minutes or more to convert from YouTube to mp3.
Youtube3mp3 never saves any types of mp3 file; when a conversion is required the software simply downloads the video from YouTube and converts it.
90% of the time required to download and convert the file to mp3 format is taken up by the software downloading the video content.
A video downloaded from YouTube weighs on average between 50 and 300 Mb.
The longer the video, the longer it takes for the software to download it.
Once the video has been downloaded, the conversion from YouTube to mp3 is by far the fastest stage of the process.