Just to reiterate and maybe clear up some things from above
- If you have already selected a custom ID for your channel (which you can do once you have hit 100 subscribers), then this can not be changed again, even acting as a network we (Freedom) can not bypass that
- If you haven't selected a custom ID yet then you can change this yourself by going to your advanced account settings in YouTube and then selecting a custom URL - as a further note even though this will change you can still find your channel by using the old URL ( the random letters / numbers that you had before )
Hope this helps