adding both r5---sn-uxaxoxu-cg0k.googlevideo.com AND r5.sn-uxaxoxu-cg0k.googlevideo.com entries eventually leads to An error occurred , no more video's. Originally (the current script), only ads the r5.sn-uxaxoxu-cg0k.googlevideo.com (A record) entry, tailing the pihole log shows youtube always requests the r5---sn-uxaxoxu-cg0k.googlevideo.com (CNAME) entry