YouTube music videos aren't stored in WAV format. You'll need to make 2 things: download video and change its format into WAV. With the help of Freemake freeware, you'll easily get an uncompressed audio track with great bitrate and high sound quality. Export songs to your mobile phone or portable music player and enjoy favorite tunes!
Here's How to Convert YouTube to WAV:
Step 1. Copy link
Download, install and run Freemake Video Downloader. Go to YouTube and copy the URL of the video you need.
Step 2. Download audio file
Click "Paste URL", choose the quality and "Convert to MP3" action. Hit "Download & Convert".