How to Convert YouTube Video to MP3
If you have come across a song in a YouTube video that you would like to add to your digital music collection, it is possible to do so straight from the video. In order to create an MP3 of the audio, you must first download the YouTube video and then extract and convert the audio into an MP3.
Download the Video
Find the video on YouTube and open it in your browser window. Copy the video's URL from the address bar. You will use this URL in order to download the video to your system.
Go to KeepVid.com or ClipNabber.com. KeepVid and ClipNabber are both online systems that can capture the video from a URL and convert it into a downloadable MP4 video file.
Paste the video URL you copied into the provided URL box. Press the "Download" button on KeepVid or the "Nab Video!" button on ClipNabber to create the download link. It will take a few seconds for the links to appear beneath the URL box.
Download the video to your computer. There will be two download links available in both KeepVid and ClipNabber. Click on the MP4 link and then click "OK" to download it. The MP4 will automatically save into the "Downloads" folder on your computer.
Convert the MP4 to MP3
Go to the Media-Convert website. Media-Convert is an online converter that can convert between multiple audio and video formats. It can convert MP4 video into MP3 audio.
Upload the MP4 file into the Media-Convert converter. To upload, click the "Browse" button next to "File." A search window will come up. Browse through the folders on your hard drive and when you locate the MP4 file you downloaded, click "Open." Once you have selected a file, the "Input format" box will fill in automatically.
Choose the MP3 output format. The MP3 option will appear in the second "Output format" pull-down menu as "MPEG-1/2 Audio Layer 3 (.mp3)."
Click the blue "OK" button. When you click the button, the MP4 file that you downloaded will convert into MP3. The progress of the conversion will be monitored in the middle of the Media-Convert screen. Once the conversion is complete, you will automatically be transferred to the download page.
Download the MP3 from Media-Convert. To download, click on the link and click "OK" to save the MP3 to your computer.