Shot in the standard factory setting (non-adjustable as far as I am aware) 1080p HD...
There is the option of 4K for stills...
I imported the timelapse footage into Premier Pro CC and used this time-mapping tutorial,
https://www.premiumbeat.com/blog/3-approaches-for-time-remapping-in-adobe-premiere-pro/
to increase the speed by 800%
Use Time Remapping
1. Right-click on your clip and select ‘Show Clip Keyframes>Time Remapping>Speed’
2. Increase your speed
Simply drag the ‘Rubber Band’ on your clip up and down to increase/decrease the clip duration. You can Command+Click on a Mac or Control+Click on Windows to set keyframes. There are actually a lot of really cool ways to manipulate clip speed using this feature. The video tutorial below outlines a few helpful ways to use the Time Remapping Tool.
The slo motion sunset (and lucky bird) is as per the default settings within the Oneplus 3T; which, by the way, you could also make phone calls with, if you have the time....