So you are telling me if I get the footage directly from the card through a card reader that I shouldn't see the green interference?
Here is the deal:
When you fly with the Phantom, two video recordings are done:
1) One high definition (1024, 2K or 4K) recording, directly in the drone. This footage is autonomously recorded on the SD card onboard the Phantom and is unaffected by what happens to the transmitter (except for when you change the video settings such as ISO, white balance and so). If the transmitter gets jammed or turned off, or if the drone becomes disconnected, the recording will continue until either the battery runs out, or the memory card gets full.
2) A low resolution (720p) recording on your tablet of the transmitted video feed. This is a recording of what you see on your tablet while you are flying. It can also contain audio from your tablet. If the drone gets disconnected, the recording will stop (there is no video signal to record). Also, if you encounter a temporary degradation of the video signal (e.g. interference or weak signal), the corrupt video feed gets recorded on the tablet.
Most of us will use only the onboard recording as it has a much higher image quality than the video recording on the tablet. So what is the purpose of the recording of the transmitted signal? Well, for instance, if you lose the drone (e.g. if you run out of battery and it autolands in a distant location), the recording on the tablet can help you locate the drone.
What you see is probably the corrupt video feed on the tablet. If you extract the true HD recording from the drone itself, you will probably see a perfect recording. If not, you either have a problem with your memory card or the drone.