1. Download
VDownloader2. Download
Audacity2. Find a video on YouTube that you want to download
3. Open VDownloader
4. Look in the upper left corner for "OUTPUT FORMAT". Change it to MP3 (Audio only)
5. Copy the URL of the YouTube video and VDownloader will automatically start downloading it
6. VDownloader will ask you where it will be saved. Remember where you saved it.
7. Once it is done downloading and converting, open up Audacity.
8. Find the MP3 that you downloaded
9. Trim the part of the audio that you want
10. Do File -> Export as Ogg Vorbis, remember where the file is
11. Once done, close Audacity, and hit no
12. You've got your OGG