How to Download Online Video to MP3
If you wish to extract audio track from online videos, Wondershare UniConverter (originally Wondershare Video Converter Ultimate) also provides you a quick and direct way out working as a MP4 to MP3 converter.
Video Tutorial: Wondershare UniConverter - Download Video to MP3
Step 1 Copy Video URL
Find the video that you want extract audio first, then copy its URL from the address bar.
Step 2 Run Wondershare UniConverter
Launch Wondershare UniConverter (originally Wondershare Video Converter Ultimate) and click Download section in the top, then click the drop-down icon beside +Paste URL and select Download MP3.
Step 3 Download MP3 from Video
The program will start downloading the audio track of the video immediately, and the progress bar shows the download speed and remaining time.
Step 4 View Extracted MP3 File
When it ends, you can see the extracted audio file in .mp3 under Finished tab.
Note that all the downloaded videos will be automatically saved to a folder named UniConverter Downloaded on your computer (created by the program). You can easily access it by right-click downloaded videos under Finished tab and choose Open File Location. FYI, please check Download Video Tips for more downloading tricks.