Video keeps on downloading; no audio

I have been trying to use it for downloading a private vimeo video.
But the download keeps going on and on, even crossing 10-15GB and then I get fed up and stop it by ctrl+C.
The video isn't supposed to be that large in size. In fact if I just stop the download around 200MB and play the video, the video is fully downloaded, but with no audio.
I have used -- combine, and even provided ffmpeg, but still nothing happens and the video keeps on downloading. And even if I stop after many GBs, there still no audio.