add webm_480p, webm_720p to ChangeLog.
tree37a8b03d686593f95436436710abec237993d9fc
-rw-r--r-- 35147 COPYING
-rw-r--r-- 30093 ChangeLog
-rw-r--r-- 1396 MANIFEST
-rw-r--r-- 34 MANIFEST.SKIP
-rwxr-xr-x 1046 Makefile.PL
-rw-r--r-- 720 NEWS
-rw-r--r-- 1201 README
-rw-r--r-- 69 TODO
drwxr-xr-x - bin
drwxr-xr-x - examples
drwxr-xr-x - lib
drwxr-xr-x - t
drwxr-xr-x - tlinks