XDA developers are the best, aren't they? When the Sony Xperia Z2 was announced, many were dismayed to learn that despite having more-than-capable hardware, Sony wouldn't introduce 4K video and Timeshift Video to the Xperia Z1 and Xperia Z1 Compact. Well, that isn't the case anymore.
If you are comfortable with rooting your phone, then enabling 4K video and Timeshift video recording (720p @ 120fps) is just two steps away. Note that these features are still buggy, so don't expect perfect clips to be taken every time.
Interested? Hit the source link posted below.