[youtube] Extracting URL: umPGmt3vUCU
[youtube] umPGmt3vUCU: Downloading webpage
[youtube] umPGmt3vUCU: Downloading ios player API JSON
[youtube] umPGmt3vUCU: Downloading mweb player API JSON
[youtube] umPGmt3vUCU: Downloading player e7567ecf
[youtube] umPGmt3vUCU: Downloading m3u8 information
[youtube] Downloading comment section API JSON
[info] umPGmt3vUCU: Downloading 1 format(s): 137+140
[info] Writing video metadata as JSON to: Double_Sonic_Rainboom-MLPFTW-20110812-youtube-1920x1080-umPGmt3vUCU.info.json