Ouch, just got burned doing video of a wedding.....I knew my 6D would record in 4GB blocks but forgot that is STOPPED at 29:59.....I got one 18:08 minute block & one 11:51 minute block before it turned off.
The tripod mounted 6D was positioned high up on the church balcony, next to the organist, to provide B-roll footage of the entrance & exit of the wedding party. It ran unattended, picked up the wedding party entrance just fine, missed the exit 45 minutes later, long after the maximum recording time. (I was on the main floor near the front). Now if I'd just asked the organist to reach over and........
Lucky for me I had two other cameras running, a GoPro for entire ceremony & a G7X for closeups sequences. This video was not paid work, it was "extra" for my relatives since they only hired a still photographer & didn't think they wanted a videographer as well.....of course, now that the wedding is over they're happy to watch videos of the rehearsal, the wedding itself & the reception.
There's still a place for camcorders & if I was doing this as a job I would have brought one & some wireless mics to capture decent audio.