403. That’s an error.

Your client does not have permission to get URL /api/manifest/dash/expire/1566529564/ei/vANfXZOiJZLh1gahrpnoDw/ip/206.189.28.134/id/d51fda835b315c95/source/youtube/requiressl/yes/playback_host/r1---sn-aigzrn7z.googlevideo.com/mm/31%2C29/mn/sn-aigzrn7z%2Csn-aigl6ney/ms/au%2Crdu/mv/m/mvi/0/pl/21/tx/23824528/txs/23824528%2C23824529%2C23824530%2C23824531%2C23824532%2C23824533%2C23824534%2C23824535%2C23824536%2C23824537%2C23824538/hfr/all/as/fmp4_audio_clear%2Cwebm_audio_clear%2Cwebm2_audio_clear%2Cfmp4_sd_hd_clear%2Cwebm2_sd_hd_clear/initcwndbps/115000/mt/1566507886/fvip/1/itag/0/sparams/expire%2Cei%2Cip%2Cid%2Csource%2Crequiressl%2Ctx%2Ctxs%2Chfr%2Cas%2Citag/sig/ALgxI2wwRQIhAKxrleDwZrdLPlsFXOjhKQZ79k69-3rYytPh-VBd0hsTAiAjvKQ8Pqcfpu9QUCeS3RNtStHWWLQmvMvKtLT-FKha8g%3D%3D/lsparams/playback_host%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps/lsig/AHylml4wRgIhAIDtxoQF8a8v-1FgKOwFhXKcnw_7_1eocOPBbaH1LzyWAiEAprX_abLWFMqR_mNjWYoK0dTs2YV56fyiYSX4aMhDrew%3D from this server. That’s all we know.