From an EMC and RF shielding point of view, the answer to where and how often do you bond, is "it depends".
If you are shielding to minimize RF (Radio Frequencies) from getting in or out of the cable, the answer is everywhere you go thru a bulkhead and both ends of your shielding.
If you are shielding for Low Frequencies (Audio and the like) Then TYPICALLY you bond at only one end of the shielding, where most of the shielded cables terminate. Usually at the mixing consoles, equipment racks, etc.
CATV signals definitely falls under the RF classification, therefore I would bond the shielding at every point available. One thing to watch out for, is that the RF shielding does not become the bonding conductor for something else. Stray currents running down the shield can play havoc with video signals.