Default 120fps recording on the nexus 5?

I saw this link

Where someone posted a mod for the G2 where they enabled 4k video and 120fps recording. I am interested if we could do this on the nexus 5?

Is it a hardware limitation? I'm pretty sure the s800 can handle it and the camera can snap a picture in 8mp resolutions, so I would think you could mod it to record video in 2k, or 4k resolutions.

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