Download error with youtube-dl and axel

I am trying to download following video: https://www.youtube.com/watch?v=pQWj2Fgxdrc by combining 'youtube-dl' and 'axel'. I am trying to download this video in such a way that I want these two softwares (youtube-dl and axel) to not only save this video as "interview.mp4" but also limit download speed to 200KB. For this purpose, I used following command: youtube-dl -f 22 -c -i --external-downloader /usr/bin/axel -o 'interview.mp4' -s 200000 https://www.youtube.com/watch?v=pQWj2Fgxdrc Here I am using following options: > -f 22 for video format > > -c for resume download > > -i for ignore errors > > -o for output file name > > -s 200000 for limit download speed to 200KB However, instead of downloading the video at 200KB and saving it as "interview.mp4", it is giving following error: ERROR: fixed output name but more than one file to download I have also tried following variation of command: youtube-dl -f 22 -c -i --external-downloader /usr/bin/axel -s 200000 -o 'interview.mp4' https://www.youtube.com/watch?v=pQWj2Fgxdrc and youtube-dl -f 22 -c -i --external-downloader /usr/bin/axel -o 'interview.mp4' https://www.youtube.com/watch?v=pQWj2Fgxdrc -s 200000 and youtube-dl -f 22 -c -i -o 'interview.mp4' --external-downloader /usr/bin/axel -s 200000 https://www.youtube.com/watch?v=pQWj2Fgxdrc But still same error is appearing. However, if I remove the option (-s 200000), the error disappear and the video starts to download. But I want to use (-s 200000) option so that it should not eat all the bandwidth. What mistake I am doing here?