403. That’s an error.

Your client does not have permission to get URL /api/manifest/dash/playlist_type/DVR/key/yt6/upn/OlXrWwK-70c/source/yt_live_broadcast/sparams/as,gcr,hfr,id,ip,ipbits,itag,playlist_type,requiressl,source,expire/gcr/us/signature/80C14B2024BE29F75C1DBF68CDBDEF411A632D5E.893DDA5444737864A0068A89270AB08F26ACF9D3/fexp/9407060,9416126,9416891,9422596,9428398,9431012,9433096,9433223,9433946,9435526,9435876,9437066,9437553,9437742,9439652,9440376/ip/216.228.112.21/requiressl/yes/itag/0/as/fmp4_audio_clear,webm_audio_clear,webm2_audio_clear,fmp4_sd_hd_clear,webm2_sd_hd_clear/expire/1467351997/id/njCDZWTI-xg.54/sver/3/ipbits/0/hfr/1 from this server. That’s all we know.