Overheating:
Fuji X-T2:
https
/www.lensrentals.com/blog/2017/01/an-overview-of-the-fuji-x-t2-for-video/
The image quality can only carry the camera so far, and the Fuji X-T2 does become less appealing as you start to pull back and look at the package as a whole.
4K video clips are limited to 10 minutes for fear of overheating.
X-T1:
https/www.dpreview.com/forums/thread/3824353
X-T20:
https
/www.cinema5d.com/fujifilm-x-t20-review-real-world-video-samples-and-first-impressions/
One set back that should be taken into consideration when shooting is the restricted 10-minute recording time in 4K, 15-min in full HD and 29-min in 720p.
https/www.dpreview.com/forums/thread/4133449
"The reason for the 10 minute limit for 4K video is undoubtedly a technical reason due to heat build up.
Sony was the 1st to introduce 4K video in its cameras and they often overheated after varying lengths of time (depending on the air temp)."
The X-T2 can do the standard 30 minute video with the addition of the optional($$) battery grip
http
/mirrorlesscomparison.com/preview/fuji-xt2-and-xt20/
That is not available for the X-T20.