I saw these caveats:
Max.29 min 59 sec.
5-Axixs compensation does not work with 4K video recording.
Works for photo shooting only.
Based on the CIPA standard, when using Live View Finder.
Looks like the 30 minute limit is in place on this one also.
Note that the 5-axis OIS is for video only, but wont work at 4K video rates.
It also looks like that really nice OLED viewfinder is a current hog. My Sony has the same thing. The rear LCD display eats much less juice than the EVF. All those thousands of tiny LED's need current to light up.