No, the Panasonic UX90 records UHD 4K at a maximum of 30p. For 60p recording, you must switch the resolution to Full HD (1080p).
Using the standard AG-VBR59 battery, the UX90 provides approximately 150 minutes (2.5 hours) of continuous recording time.
No, unlike the UX180, the UX90 does not have built-in ND filters. It is recommended to use 67mm external ND filters for outdoor shoots.