How merge desired video and audio?

[goodandrewsoft]

For example:

youtube-dl [url] --list-formats 

i get

249          webm       audio only tiny   49k , opus @ 50k (48000Hz), 656.90KiB
250          webm       audio only tiny   58k , opus @ 70k (48000Hz), 808.86KiB
251          webm       audio only tiny  104k , opus @160k (48000Hz), 1.44MiB
140          m4a        audio only tiny  128k , m4a_dash container, mp4a.40.2@128k (44100Hz), 1.83MiB
278          webm       256x144    144p   95k , webm container, vp9, 25fps, video only, 1.33MiB
160          mp4        256x144    144p  107k , avc1.4d400c, 25fps, video only, 923.10KiB
242          webm       426x240    240p  221k , vp9, 25fps, video only, 2.01MiB
133          mp4        426x240    240p  299k , avc1.4d4015, 25fps, video only, 1.99MiB
243          webm       640x360    360p  407k , vp9, 25fps, video only, 4.21MiB
134          mp4        640x360    360p  657k , avc1.4d401e, 25fps, video only, 4.10MiB
244          webm       854x480    480p  747k , vp9, 25fps, video only, 7.78MiB
135          mp4        854x480    480p 1035k , avc1.4d401e, 25fps, video only, 6.80MiB
136          mp4        1280x720   720p 1427k , avc1.4d401f, 25fps, video only, 9.47MiB
247          webm       1280x720   720p 1431k , vp9, 25fps, video only, 9.96MiB
137          mp4        1920x1080  1080p 2072k , avc1.640028, 25fps, video only, 14.26MiB
248          webm       1920x1080  1080p 2480k , vp9, 25fps, video only, 12.89MiB
43           webm       640x360    360p , vp8.0, vorbis@128k, 9.78MiB
18           mp4        640x360    360p  456k , avc1.42001E, mp4a.40.2@ 96k (44100Hz), 6.58MiB
22           mp4        1280x720   720p  783k , avc1.64001F, mp4a.40.2@192k (44100Hz) (best)

How download formats: 137(video) and 140(audio) and the merge?

Also
How download formats: 137(video) and best audio and the merge?
Thanks