selecting formats with lowest bitrate and width <= 400

[sant527]

I am trying download video from "http://www.cbsnews.com/videos/the-north-korean-threat"

youtube-dl -F "http://www.cbsnews.com/videos/the-north-korean-threat"
hls-meta-0   mp4        multiple   Quality selection URL 
hls-meta-1   mp4        multiple   Quality selection URL 
hls-meta-2   mp4        multiple   Quality selection URL 
hls-64-0     mp4        audio only   64k , mp4a.40.2
hls-64-1     mp4        audio only   64k , mp4a.40.2
hls-1        mp4        400x224       1k 
hls-110      mp4        400x224     110k 
http-150     mp4        400x224     150k 
hls-224-0    mp4        400x224     224k , avc1.42001e, mp4a.40.2
hls-224-1    mp4        400x224     224k , avc1.42001e, mp4a.40.2
http-240     mp4        400x224     240k 
hls-250      mp4        400x224     250k 
rtmp-364     flv        384x216     364k 
hls-364-0    mp4        400x224     364k , avc1.42001e, mp4a.40.2
hls-364-1    mp4        400x224     364k , avc1.42001e, mp4a.40.2
http-440     mp4        400x224     440k 
rtmp-496     flv        640x360     496k 
hls-500      mp4        512x288     500k 
hls-614-0    mp4        512x288     614k , avc1.42001e, mp4a.40.2
hls-614-1    mp4        512x288     614k , avc1.42001e, mp4a.40.2
http-740     mp4        640x360     740k 
rtmp-796     flv        640x360     796k 
hls-800      mp4        640x360     800k 
hls-914-0    mp4        640x360     914k , avc1.42001e, mp4a.40.2
hls-914-1    mp4        640x360     914k , avc1.42001e, mp4a.40.2
hls-914-2    mp4        640x360     914k , avc1.42001e, mp4a.40.2
hls-1200     mp4        768x432    1200k 
rtmp-1296    flv        640x360    1296k 
hls-1314-0   mp4        768x432    1314k , avc1.4d001f, mp4a.40.2
hls-1314-1   mp4        768x432    1314k , avc1.4d001f, mp4a.40.2
hls-1800     mp4        960x540    1800k 
hls-1914-0   mp4        960x540    1914k , avc1.4d001f, mp4a.40.2
hls-1914-1   mp4        960x540    1914k , avc1.4d001f, mp4a.40.2
rtmp-1928    flv        1280x720   1928k 
hls-3500     mp4        1280x720   3500k 
hls-3678-0   mp4        1280x720   3678k , avc1.4d001f, mp4a.40.2
hls-3678-1   mp4        1280x720   3678k , avc1.4d001f, mp4a.40.2
hls-5000     mp4        1920x1080  5000k 
hls-5178     mp4        1920x1080  5178k , avc1.4d001f, mp4a.40.2 (best)

now i am looking for downloading video with format whose width < 400

I tried

1. -f "worst[width<=400]"
2. -f "[width<=400]"
3. -f "best[width<=400]"

All of them download "http-440 mp4 400x224 440k" format.

Logically i want the first video format with 400 to be selected. that will be "hls-1 mp4 400x224 1k "

List of formats with width <=400

hls-1 mp4 400x224 1k
hls-110 mp4 400x224 110k
http-150 mp4 400x224 150k
hls-224-0 mp4 400x224 224k , avc1.42001e, mp4a.40.2
hls-224-1 mp4 400x224 224k , avc1.42001e, mp4a.40.2
http-240 mp4 400x224 240k
hls-250 mp4 400x224 250k
rtmp-364 flv 384x216 364k
hls-364-0 mp4 400x224 364k , avc1.42001e, mp4a.40.2
hls-364-1 mp4 400x224 364k , avc1.42001e, mp4a.40.2
http-440 mp4 400x224 440k

[dstftw]

Your first option does exactly what you want:

youtube-dl http://www.cbsnews.com/videos/the-north-korean-threat -f 'worst[width<=400]' --get-filename -o '%(format_id)s'
hls-1