403. That’s an error.

Your client does not have permission to get URL /api/manifest/dash/requiressl/yes/source/youtube/id/272722c70e072812/itag/0/ei/Q0TmXImBB9aZmLAPoIyluAs/playback_host/r1---sn-aigzrn7e.googlevideo.com/mm/31%2C29/mn/sn-aigzrn7e%2Csn-aigl6n7d/ms/au%2Crdu/mv/m/pl/64/hfr/all/as/fmp4_audio_clear%2Cwebm_audio_clear%2Cwebm2_audio_clear%2Cfmp4_sd_hd_clear%2Cwebm2_sd_hd_clear/initcwndbps/366250/mt/1558594531/fvip/1/ip/2a03%3Ab0c0%3A1%3Ad0%3A%3Abda%3A1/ipbits/0/expire/1558616227/sparams/ip%2Cipbits%2Cexpire%2Crequiressl%2Csource%2Cid%2Citag%2Cei%2Cplayback_host%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Chfr%2Cas%2Cinitcwndbps/signature/4A4EB51BD03587B44DE5B314EA990655CD7E5240.0CFF23737C057A918E1ABFB643527C2C23A43AA6/key/yt8 from this server. That’s all we know.