прошло более года. И утилита все еще работает при HTML5 ютубе
тест от среда 04 ноябрь 2015г
jeny@jeny-Lenovo-IdeaPad-S10-2:~$ get_flash_videos http://www.youtube.com/watch?v=nv0CjGdOLxY
Using method 'youtube' for http://www.youtube.com/watch?v=nv0CjGdOLxY
Downloading http://www.youtube.com/watch?v=nv0CjGdOLxY
Downloading http://r6---sn-ug5onuxaxjvh-n8vz.googlevideo.com/videoplayback?itag=22&mv=m&mt=1446563970&ratebypass=yes&ms=au&pl=23&mime=video%2Fmp4&dur=858.232&id=o-AFVa61vsvBERuDi0mhU9lhUKpmKBdHCklUM8w3MKdWvT&mn=sn-ug5onuxaxjvh-n8vz&signature=D0FBB8802B4534E57D66D4393A0206B993ED64DF.86AA5AA1F1F19F4DD78AF85E92E3BB1CD068D326&source=youtube&mm=31&sparams=dur%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Cratebypass%2Csource%2Cupn%2Cexpire&sver=3&fexp=9408710%2C9413142%2C9414764%2C9414929%2C9416126%2C9417707%2C9418200%2C9418997%2C9419445%2C9421744%2C9422596%2C9423200%2C9423436%2C9423663%2C9423775%2C9423791%2C9423846&key=yt6&lmt=1446437420083619&ipbits=0&initcwndbps=2647500&upn=k4U6-PlkwBE&expire=1446585632&ip=62.33.207.200&signature=...
QEMU_Arch_Linux.mp4: 5% (5744.18 / 114869.24 KiB)^C
jeny@jeny-Lenovo-IdeaPad-S10-2:~$ uname -a
Linux jeny-Lenovo-IdeaPad-S10-2 3.19.0-31-generic #36~14.04.1-Ubuntu SMP Thu Oct 8 17:59:01 UTC 2015 i686 i686 i686 GNU/Linux
jeny@jeny-Lenovo-IdeaPad-S10-2:~$