I wonder if its possible to losslessly download & cut video from remote server. Currently i'm using a bash script with ffmpeg i've got from stackoverflow to download a small portion of video from the likes of YouTube. But currently, it has to re-encode the video on the fly while downloading. For now, I assume it's impossible to losslessly download & cut this kind of video because we don't have the information about the video locally (keyframes, etc). But I like to be proven wrong!