Clip Converter is alternative way to save YouTube Videos into multiple file formats. Supports Tablets, iPhone, & Mac..... With Clip Converter you can convert YouTube to MP4, 3GP, MKV, AVI, MOV file formats up-to 4K resolution.
OnlineVideoConverter.com - OnlineVideoConverter.
CONV. - Convert YouTube video to MP3, GIF or MP4
Ytmp3.cc - By using our converter you can easily convert YouTube videos to mp3 (audio) or mp4 (video) files and download them for free - this service works for computers, tablets and mobile devices.
Downie - Video download for OS X. Downie supports at this moment over 1,000 different sites.
VidToMP3.com - VidToMP3.
Yout - YouTube to Mp3 Converter