403. That’s an error.

Your client does not have permission to get URL /api/manifest/dash/expire/1563858652/ei/fEI2XbK8F4WdzLUPkIeIoAc/ip/2602%3Affc5%3A%3Affc5%3A556c/id/6d50f7a3b3a026ad/source/youtube/requiressl/yes/playback_host/r4---sn-p5qlsndr.googlevideo.com/mm/31%2C29/mn/sn-p5qlsndr%2Csn-p5qs7nes/ms/au%2Crdu/mv/u/mvi/3/pl/44/hfr/all/as/fmp4_audio_clear%2Cwebm_audio_clear%2Cwebm2_audio_clear%2Cfmp4_sd_hd_clear%2Cwebm2_sd_hd_clear/mt/1563836331/fvip/4/itag/0/sparams/expire%2Cei%2Cip%2Cid%2Csource%2Crequiressl%2Chfr%2Cas%2Citag/sig/ALgxI2wwRgIhAMLSSHSOtgGapG-gejPFgJbEv1uV0vBZ6R4x7TnaLkD1AiEAwsD8u7KKFtqhPOUJzMZVTlwc9b-KIpuMdpdMPO9475Q%3D/lsparams/playback_host%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl/lsig/AHylml4wRQIhAN9_yRKFM0rx2i5QD4zy0Nu7hHtx_-KT0kHTjK4w-VCBAiAm1YnKWVXc7kAydnQHUztruw0ssKmXeJMfs9YZVJuVSg%3D%3D&title=Fire+questions+with+Cara+Delevingne from this server. That’s all we know.