When I saw the subject that UP was missing from FED, but no, the usual reoccurring no meal at weddings gripe.
As a seasoned (no pun intended) videographer, I am guessing your new to the scene.
When I started, I to went round looking for scraps, but in those days it was mainly village halls and so outside caterers were involved, so you could ponce one of them, normally, but as you say not until just before the speeches start. So when you came back it was either cold or gone....
It is in my contract these days and checked before the day to make sure it is not overlooked, working all day without refreshments is tuff especially on hot days. I did try sandwiches but they I am not a lover of them and they are normally warm and not very tasty time I got to them.
Strangely any foreign type wedding (Asian, Jewish etc) they expect you to eat and normally supply a separate suppliers table.
Being in that category myself (just) the first thing any visitor coming to my house gets offered refreshments or food if they are working for me. Perhaps its social manners or years of struggling with no food at weddings and so can relate to it.
13) Operator requirements.
If the camera operator is to film for longer then 4 hours then some form of hot refreshment must be provided.