It is never a big deal to download Youtube videos Online. You can use any reliable Youtube Video Downloader and Youtube Downloader to Convert Youtube to MP3, MP4 and other supported file formats depending on your choice.
The OnlineVideoConverter is really a great online tool for downloading Youtube Videos to MP3 format and MP4 as well. It is a Youtube to MP3 Converter online. Feel free to use it as soon as it is needed. Cheers!