DASH only streams return an error.

[qtlin]

I suppose it might be YoutubeExplode limitation but still worth bringing to everybody's attention.
A live stream has ended and following formats are reported by youtube-dl:

format code  extension  resolution note
139          m4a        audio only DASH audio   64k , m4a_dash container, mp4a.40.5@ 48k (24000Hz)
140          m4a        audio only DASH audio  144k , m4a_dash container, mp4a.40.2@128k (48000Hz)
160          mp4        256x144    DASH video  124k , mp4_dash container, avc1.42c00b, 30fps, video only
133          mp4        426x240    DASH video  258k , mp4_dash container, avc1.4d4015, 30fps, video only
134          mp4        640x360    DASH video  646k , mp4_dash container, avc1.4d401e, 30fps, video only
135          mp4        854x480    DASH video 1171k , mp4_dash container, avc1.4d401f, 30fps, video only
136          mp4        1280x720   DASH video 2326k , mp4_dash container, avc1.4d401f, 30fps, video only
298          mp4        1280x720   DASH video 3481k , mp4_dash container, avc1.4d4020, 60fps, video only
137          mp4        1920x1080  DASH video 4347k , mp4_dash container, avc1.640028, 30fps, video only
299          mp4        1920x1080  DASH video 5791k , mp4_dash container, avc1.64002a, 60fps, video only (best)

Eventually YouTube will process the finished stream and makes it available in usual formats

format code  extension  resolution note
249          webm       audio only tiny   70k , opus @ 50k (48000Hz), 78.47MiB
250          webm       audio only tiny   88k , opus @ 70k (48000Hz), 98.02MiB
140          m4a        audio only tiny  142k , m4a_dash container, mp4a.40.2@128k (44100Hz), 199.50MiB
251          webm       audio only tiny  152k , opus @160k (48000Hz), 177.44MiB
278          webm       256x144    144p  132k , webm container, vp9, 30fps, video only, 101.06MiB
160          mp4        256x144    144p  152k , avc1.4d400c, 30fps, video only, 95.36MiB
242          webm       426x240    240p  288k , vp9, 30fps, video only, 154.27MiB
133          mp4        426x240    240p  361k , avc1.4d4015, 30fps, video only, 210.76MiB
243          webm       640x360    360p  502k , vp9, 30fps, video only, 270.67MiB
134          mp4        640x360    360p  745k , avc1.4d401e, 30fps, video only, 401.81MiB
244          webm       854x480    480p 1005k , vp9, 30fps, video only, 439.08MiB
135          mp4        854x480    480p 1275k , avc1.4d401f, 30fps, video only, 715.00MiB
247          webm       1280x720   720p 1978k , vp9, 30fps, video only, 859.56MiB
136          mp4        1280x720   720p 2255k , avc1.64001f, 30fps, video only, 1.33GiB
302          webm       1280x720   720p60 3041k , vp9, 60fps, video only, 1.15GiB
248          webm       1920x1080  1080p 3045k , vp9, 30fps, video only, 1.18GiB
298          mp4        1280x720   720p60 3701k , avc1.640020, 60fps, video only, 1.76GiB
303          webm       1920x1080  1080p60 4462k , vp9, 60fps, video only, 1.50GiB
137          mp4        1920x1080  1080p 4817k , avc1.640028, 30fps, video only, 2.49GiB
299          mp4        1920x1080  1080p60 6307k , avc1.64002a, 60fps, video only, 3.17GiB
18           mp4        640x360    360p  386k , avc1.42001E, 30fps, mp4a.40.2@ 96k (44100Hz), 595.74MiB
22           mp4        1280x720   720p 1009k , avc1.64001F, 30fps, mp4a.40.2@192k (44100Hz) (best)

and download becomes possible.