I am not a lawyer nor had any experience...........
Then why even post?
The short answer is... "No, not always".
The slightly longer answer is...
"If you mean something like
'Does it have to have a running clock in the corner of the screen?',
then no, it doesn't always have to have that.
However, in order for the video to be given much (or any) weight as evidence,
then, depending on the nature of the case, and what you're trying to prove with it,
you may need more than the mere File Properties (which are easily manipulated)
to support any claim that the footage depicts what you claim it does, at the time and date it does."