Three key features of Allavsoft - the professional Video Downloader app: One step to download and convert F4F, FLV, F4V, F4M, WebM to MP4, AVI, MOV, WMV, MPG, MP3, WAV, AIFF, WMA, M4A; Download movies from 100+ video sharing sites like Dailymotion, Facebook, eHow etc; Fast download videos in ultra high definition 4K 4096p, HD 1080p, 720p, 3K, 3D or SD 480p or 360p.