[mythtv-users] how to change permissions on /dev/video0 permanantly

[philipp sutter]

on my system the user mythtv has no access to /dev/video0 
because the permessions for /dev/video0 are:

$ crw-------  1 phil video 

so i do as root:
$ chmod go+rw /dev/video0

after that i am happy. but when i boot, the permissions are again

$ crw-------  1 phil video 

does anybody know, how i can change the permissions permanantly?

thank you for any hint in advance!