Static when recording - Nexus 7 (2013) Q&A

I've had the N7 (stock) for about a month. I guess I never recorded a video because I just noticed lots of static when recording. In both Vine and the stock video camera, front and rear cameras, the audio from those vids is filled with static, although you can still hear everything else. I tried a video Hangout and there was no static.
Am I alone in this? Any fixes?

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Got 2.2 from the latest OTA and have been encountering some video issues. Just wondering if anyone else has them, and if there are fixes.
The major issue I have is videos lag and stutter. With 2.1, 720p videos recorded from the rear camera worked flawlessly. Now, those videos have short stuttering pauses every second. It makes it very hard to watch. 480p videos do not exhibit this problem.
Is it because the data is not being streamed off the SD card quick enough? Some evidence to that is that the thumbnails in the Gallery take noticeably longer to show up.
In 2.1, when I long press on a video in Gallery and select Details, it would show resolution and framerate. This info is not present in the current Gallery. Is there a fix for that?
I'm particularly interested in framerate, because in 2.1, I noticed that videos would be recorded at low fps when the lighting was dark. (some vids I have even dropped to 10 fps!) Perhaps HTC couldn't fix the low fps recording problem and instead just swept it under the run by not displaying the framerate info at all.
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[Q] What are these strange "scritch" sounds when video recording?

this is a video I took
youtu[dot]be/Vn7GNdQ-fNk
please replace [dot]
I'm not sure if the problem with the audio is because of the loud sound coming from the bad or something else.
There's also an annoying "scritch" sound every 2-3 seconds or so.
I have original firmware, used the stock video recorder. No change in settings except for video resolution at 640x480
Is anyone else having problems recording a video with Note 2?

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