The left video is handheld and intentionally rotated. The two videos on the right side were stabilized in two different ways using "ReelSteady GO" software. "Lock Horizon" was checked in "ReelSteady GO", thus the image always stays horizontal. The GoPro Hero 5 Session camera also records gyroscope data which lets the stabilization software know to which angle was the camera rotated and thus it can zoom it (faster or slower) and rotate it back to horizontal.
Original clip is 4:3
Stabilized clips are cropped down by ReelSteady to just 16:9
Quick zooming in-out is visible at 0:11 on the lower right clip
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![](https://s2.save4k.ru/pic/VzpziaJv0PI/maxresdefault.jpg)