I encounter and DOWNLOAD_ERR when I use the VideoCache Bundle 1.9.2 that I just brought. I had been running VideoCache using the same version 1.9.2 (older) without problem using the same configuration but with the new bundle is not caching any youtube video.
I post a part of the /var/log/videocache/videocdache.log here,
Below is my configuration,
Temporary I am going to use back the old VideoCache that's still working fine although it have some minor error message in log file.
The fault is not with the package. Youtube has changed their URL structure. I am working on improving the package. Please be patient. Please check this comment for details.