As I have a 5D2 I Just press the half shutter button to reset the time counter. The limit is 29:59 minutes for live view and can not be change as its in the Canon firmware.
And yes its very hard to find information on the forum, There is posts every where and for
New people it a nightmare.
I don't have a problem answering these type of questions, as some on the forum think it's better to put down people because there can't find the answer , but in truth
because the same question keeps coming up that would indicate that the Topic was never
answered properly.
As there say, "one persons garbage is another persons gold"