It's been hit-or-miss when recording my favorite shows over the air.
The same show on the same channel is sometimes recorded to perfection, while other times, it is unwatchable.
When a recording is unwatchable, it looks like somebody painted the screen in haste. Nothing is recognizable other than the vague color of what must be playing.
Another interesting phenomenon I've noticed is that the program will fast forward and skip minutes or even tens of minutes forward on its own. A 30-minute quiz show will complete playing in less than 3 minutes in some cases.
What does this indicate? Is it just another consequence of a poor OTA signal? Or is it a sign that the problem may lie somewhere other than the OTA signal - e.g., network bandwidth?