The link does not work for me. ISE 500 error.
I am not Yon's biggest fan as I find him to be far too self promotional and never shy to use flammatory subjects to achieve more hits/fame etc.
I do quite a bit of video and have, over the years, encountered the 30-minute regulation only once. Frankly it is a non-issue, as if you know what is going to happen you plan accordingly. You may lose a second of image, perhaps two. Or you can stop recording during a break in proceedings before you get to 29:59.
It is such a rare occurrence I wonder why it gets discussed so much.
If you really want to frequently shoot continuous video for longer than 30 minute without a single 1-2 second pause to restart the clock, then perhaps you should not be using a DSLR.
You will also need plenty of batteries. When I am at an all day event with different sessions through the day, I plug my charger in, shoot, change battery charge one, replace repeat etc.