Mettle SkyBox Studio | Stabilize 360 footage in After Effects and other VFX

Do the track point has to be ONLY under the camera?
I tried several techniques really careful, doesn't work. This technique doesn't save the null trackpoints, I used Shift+ctrl for Null position changing to 0, but after this my drone footage just turn around 90 degrees and this is it.
With the Composer technique, I stuck on the point where I apply 3D tracker - then, no option to add camera or stabilize. Could you help? I see no answers on the older comments. :/

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sorry about ur english.....

How does something like this work if the footage tilts much more? Is it just a keyframe of tilt/roll or is there a quicker process?

Unfortunately confuse the seams ....

Great tutorial, thank you for that. But I still have a question here. What exactly are the benefits of creating such VFX with skybox? Wouldn't it be easier to create those VFX on a normal video first and then use skybox to make a 360° video out of it as the final step?

how do we find a video like this ? or how can we record a video like this ?