m3u8文件里面全是key等值是啥情况

#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:18
#EXT-X-ALLOW-CACHE:YES
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-KEY:METHOD=AES-128,URI="https://em.org/hls/33722/clef/c98db5f6b62511ec9c48fa163e746abf",IV=0xe95a3d6f1f9d354bec99fac35b56ea1e
#EXTINF:17.000,
https://ese5a9b5c3d0go-pub.pubssl.qin.net/59530/2aea8c20641e4d0280956b22deb542ac/lmhg956bsb-ZkNMA-merged-shd_seg_0_ehls_62bebc?schoolId=59530&fileGlobalId=2aea8c20641e4d0280956b22deb542ac&userId=134924&userName=%E8%A2%81%E8%B6%85
#EXT-X-KEY:METHOD=AES-128,URI="https://edu.tm.org/hls/33722/clef/c98db5f6b62511ec9c48fa163e746abf",IV=0x1a58ae279cd9389ff0af0a6cb189258f
#EXTINF:10.000,
https://ese5a9b5c3d0go-pub.pubssl.un.net/59530/2aea8c20641e4d0280956b22deb542ac/lmhg956bsb-ZkNMA-merged-shd_seg_1_ehls_e77b49?schoolId=59530&fileGlobalId=2aea8c20641e4d0280956b22deb542ac&userId=134924&userName=%E8%A2%81%E8%B6%85
#EXT-X-KEY:METHOD=AES-128,URI="https://edm.org/hls/33722/clef/c98db5f6b62511ec9c48fa163e746abf",IV=0xcc6a8a64a7215a782440f2a9d845defa
#EXTINF:10.000,
https://ese5a9b5c3d0go-pub.pubssuyun.net/59530/2aea8c20641e4d0280956b22deb542ac/lmhg956bsb-ZkNMA-merged-shd_seg_2_ehls_0fd6b3?schoolId=59530&fileGlobalId=2aea8c20641e4d0280956b22deb542ac&userId=134924&userName=%E8%A2%81%E8%B6%85
#EXT-X-KEY:METHOD=AES-128,URI="https://pdm.org/hls/33722/clef/c98db5f6b62511ec9c48fa163e746abf",IV=0x13acb38ca7be0bc283e48fc27d641ef6
#EXTINF:10.000,
https://ese5a9b5c3d0go-pub.pyun.net/59530/2aea8c20641e4d0280956b22deb542ac/lmhg956bsb-ZkNMA-merged-shd_seg_3_ehls_e81402?schoolId=59530&fileGlobalId=2aea8c20641e4d0280956b22deb542ac&userId=134924&userName=%E8%A2%81%E8%B6%85
#EXT-X-KEY:METHOD=AES-128,URI="https://ed.org/hls/33722/clef/c98db5f6b62511ec9c48fa163e746abf",IV=0x16c80214f6efef8bcb63f9879a6559d7
#EXTINF:10.000,

类似这样

这是对媒体片断指定加密方法，详细参考：
https://www.jianshu.com/p/e97f6555a070
和这里：
https://blog.csdn.net/beyond706/article/details/111772810