[expert] MKNOD

[Don]

In mknod how would one create a device that is linked to another device?

I would like to make video to link to video0.  I have already found the video0
and have tried: 
mknod c video 81  0               
but I don't see the way for linking this to video0.  By the way I am tring to
get kwintv to work, and when I run the kwintv file it tells there is no such 
device as /dev/video.
this is the error Iam getting:

Fatal: v4lx: Error opening v4lx device /dev/video: No such device in ::v4lxif

Thanks for helping

Don ....