4k Download is a free, open source and cross-platform video and audio downloaders written with C++, boost and Qt. YouTube, Vimeo, Facebook, Dailymotion, Metacafe and other video-sharing services supported.
- Download video from YouTube and other video-sharing services
- Video quality up to 4k resolution
- FLV, MP4, MKV support
- Extract audio to mp3 format
- Fastest download speed
- Smart Mode for fast downloads
- Download YouTube playlists
- Download subtitles
I downloaded the application to my imac and it works with no trouble at all but I have just downloaded the latest version to my book air and it crashes on opening. I deleted and downloaded half a dozen times but no good. Please advise someone?