403. That’s an error.

Your client does not have permission to get URL /api/manifest/dash/expire/1627161442/ei/Ai_8YKmhFc_34-EP86Sx-AU/ip/51.79.156.252/id/91ff1a07aa3b8bda/source/youtube/requiressl/yes/playback_host/r3---sn-ntqe6nez.googlevideo.com/mh/Y0/mm/31%2C29/mn/sn-ntqe6nez%2Csn-npoe7ner/ms/au%2Crdu/mv/m/mvi/3/pl/22/tx/24047098/txs/24047098%2C24047099%2C24047100%2C24047101%2C24047102%2C24047103%2C24047104/hfr/all/as/fmp4_audio_clear%2Cwebm_audio_clear%2Cwebm2_audio_clear%2Cfmp4_sd_hd_clear%2Cwebm2_sd_hd_clear/initcwndbps/170000/vprv/1/mt/1627139326/fvip/3/keepalive/yes/fexp/24001373%2C24007246/itag/0/sparams/expire%2Cei%2Cip%2Cid%2Csource%2Crequiressl%2Ctx%2Ctxs%2Chfr%2Cas%2Cvprv%2Citag/sig/AOq0QJ8wRQIhANDOEJQve-RB2UlFD4BYx_9oIk_Dl5-U_d2wtY2SkPPaAiAJmvgkg0OkVpg9TUDmLbSs7aEMomUfata-jL1Swctu7Q%3D%3D/lsparams/playback_host%2Cmh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps/lsig/AG3C_xAwRgIhAOd-K7NazGjrzJz6DjcWT1tO4X5M0SDubAJUJr-OgE7-AiEAlrMwiUx820qZEBz27crhLA1LyjQPA95IeIKHHqQi-7E%3D from this server. That’s all we know.