403. That’s an error.

Your client does not have permission to get URL /api/manifest/dash/expire/1611692245/ei/dSQQYIngMeOy-gauhpf4CQ/ip/181.214.209.198/id/b2c45444fb5db221/source/youtube/requiressl/yes/playback_host/r6---sn-4g5edn7y.googlevideo.com/mh/PN/mm/31%2C26/mn/sn-4g5edn7y%2Csn-5hne6n7l/ms/au%2Conr/mv/u/mvi/6/pl/22/hfr/all/as/fmp4_audio_clear%2Cwebm_audio_clear%2Cwebm2_audio_clear%2Cfmp4_sd_hd_clear%2Cwebm2_sd_hd_clear/vprv/1/mt/1611668038/fvip/6/keepalive/yes/itag/0/sparams/expire%2Cei%2Cip%2Cid%2Csource%2Crequiressl%2Chfr%2Cas%2Cvprv%2Citag/sig/AOq0QJ8wRAIgZrQMObksNseAMs1rLZ3ufDtDlSW7WCJ3msWfDy-PM0ECIENdAJHbTuDMUKldrrJ0XpBhJiMZbeaYlsmu2nnb10Zc/lsparams/playback_host%2Cmh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl/lsig/AG3C_xAwRQIgGI5ZVPBK0f6qcSrTKCqvKfIen99OZC9XObtNZXZ3NksCIQD6ZQFqimvzfRwUMYSrfto3Hy7YWSLXyaaeww_XO_5O_Q%3D%3D from this server. That’s all we know.