403. That’s an error.

Your client does not have permission to get URL /videoplayback?expire=1637783224&ei=WEKeYafpCImPv_IP7MOl8As&ip=2001%3A470%3A6f%3A233%3A%3A3847&id=o-AKdZoL5HKtlYD6uTE3YvMEOECp_rFofGvRpz1hS3iMPx&itag=140&source=youtube&requiressl=yes&mh=J6&mm=31%2C29&mn=sn-hpa7kn7d%2Csn-hpa7znz6&ms=au%2Crdu&mv=m&mvi=4&pl=64&initcwndbps=52500&vprv=1&mime=audio%2Fmp4&gir=yes&clen=72845138&dur=4501.048&lmt=1609318137293575&mt=1637761256&fvip=4&keepalive=yes&fexp=24001373%2C24007246&c=ANDROID&txp=5531432&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cgir%2Cclen%2Cdur%2Clmt&sig=AOq0QJ8wRQIhAIB5sR-mug2-V0z6uNK8ohVt_k8G2pP27sYsMms1BXb1AiASlmEtOD_ynf3EQ5gCmtaVu9xtzzwbH0s9pAD8vxVjKg%3D%3D&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRgIhANDdVzlbNyMBHbl24ShQx3o0vAXYqR0H07ZkbpejdPs7AiEAkkr-SU-2rwEIXVabcSRAv_SNNjDQyaKDQSYLs9_MZHU%3D from this server. That’s all we know.