use "Bigasoft Video Downloader" . It can can fast download and convert YouTube to Windows Media Player compatible format in just one click.And it has both Windows version and Mac version. Bigasoft Video Downloader for Windows supports convert and download YouTube to WMP on Windows 8, Windows 7, Windows XP, Windows Vista and Windows 2000. Bigasoft Video Downloader for Mac is compatible with all any version of Mac like Mac OS X Mountain Lion, Lion, Snow Leopard and etc.
STEPS:
1.Free download the Windows version of the professional YouTube to Windows Media Player Converter - Bigasoft Video Downloader Pro (Windows Version, Mac Version), install and run it, the following interface will pop up.
2.Copy YouTube URL
3.Set Windows Media Player supported format
3.1-Click the "Automatically Convert to" drop-down button to select WMP compatible video format like WMV - Windows Media Video(*.wmv) from the "General Video" category.
3.2-To Convert YouTube to Windows Media Player friendly audio format, select WMA, MP3 or WAV as output format from the "General Audio" category.
4. Download YouTube to WMP
4.1-Click the "Download" button to start and finish downloading and converting YouTube to Windows Media Player compatible format. After it is completed, click the "Save to: " destination folder link to open the "Convert" folder to drag and drop the converted YouTube files to Windows Media Player for easy playback.