root@crazy:~/major# youtube-dl https://www.youtube.com/watch?v=V9MquuT4pog
[youtube] V9MquuT4pog: Downloading webpage
ERROR: Unable to download webpage: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:852)> (caused by URLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:852)'),))

root@crazy:~/major# youtube-dl https://www.youtube.com/watch?v=V9MquuT4pog --no-check-certificate -F
[youtube] V9MquuT4pog: Downloading webpage
[youtube] V9MquuT4pog: Downloading video info webpage
[info] Available formats for V9MquuT4pog:
format code  extension  resolution note
249          webm       audio only tiny   52k , opus @ 50k (48000Hz), 2.83MiB
250          webm       audio only tiny   67k , opus @ 70k (48000Hz), 3.23MiB
251          webm       audio only tiny  126k , opus @160k (48000Hz), 6.53MiB
140          m4a        audio only tiny  130k , m4a_dash container, mp4a.40.2@128k (44100Hz), 7.70MiB
278          webm       256x144    144p   97k , webm container, vp9, 25fps, video only, 4.53MiB
160          mp4        256x144    144p  110k , avc1.4d400c, 25fps, video only, 3.20MiB
242          webm       426x240    240p  222k , vp9, 25fps, video only, 6.65MiB
133          mp4        426x240    240p  272k , avc1.4d4015, 25fps, video only, 6.52MiB
243          webm       640x360    360p  409k , vp9, 25fps, video only, 11.61MiB
134          mp4        640x360    360p  544k , avc1.4d401e, 25fps, video only, 12.36MiB
244          webm       854x480    480p  750k , vp9, 25fps, video only, 18.47MiB
135          mp4        854x480    480p  942k , avc1.4d401e, 25fps, video only, 19.94MiB
247          webm       1280x720   720p 1515k , vp9, 25fps, video only, 51.18MiB
298          mp4        1280x720   720p50 1871k , avc1.4d4020, 50fps, video only, 37.51MiB
248          webm       1920x1080  1080p 2661k , vp9, 25fps, video only, 95.69MiB
302          webm       1280x720   720p50 2673k , vp9, 50fps, video only, 53.82MiB
136          mp4        1280x720   720p 3314k , avc1.4d401f, 25fps, video only, 65.46MiB
303          webm       1920x1080  1080p50 4429k , vp9, 50fps, video only, 159.45MiB
137          mp4        1920x1080  1080p 5848k , avc1.640028, 25fps, video only, 122.83MiB
299          mp4        1920x1080  1080p50 5967k , avc1.64002a, 50fps, video only, 137.44MiB
18           mp4        640x360    360p  512k , avc1.42001E, mp4a.40.2@ 96k (44100Hz), 30.49MiB
22           mp4        1280x720   720p 1230k , avc1.64001F, mp4a.40.2@192k (44100Hz) (best)