Why three?
Three gives the platform enough signal to learn who your audience is, while staying inside what one person can sustain alongside running a business. Below two a week, the gaps are long enough that each video starts from nothing. Above four, quality falls and so does the will to continue.
There is also a practical reason. Three videos is roughly what a single fifteen-minute filming pass produces if you know what you are looking for, which means one habit covers the whole week.
Is posting every day better?
No, and the reason is not the algorithm. Daily posting fails because of supply. You run out of things worth filming in about two weeks, and what follows is filler — a shot of the door, a menu photo with no idea behind it — which teaches the platform that your account is not worth showing.
A weak post is not neutral. It takes a slot that a stronger one could have had and it drags the average, so the next good video starts from a lower base.
How do you keep the rhythm in a busy season?
Film ahead. One fifteen-minute pass on a quiet morning produces three to four usable clips, which covers the week without you having to think about it again while the terrace is full.
Then hold two weeks of finished videos in reserve. Every venue has the week where the dishwasher breaks and someone is off sick, and a reserve is the difference between skipping that week and never restarting. Most accounts that go quiet do not decide to stop — they miss one week and never get back.
Does the day and time matter?
Far less than people think, and far less than consistency. Post when your customers are deciding: mid-morning for lunch, Thursday and Friday for the weekend, early evening for a gym.
Pick two or three fixed slots and keep them for a couple of months. A predictable rhythm is worth more than an optimal one that you rearrange every week based on a chart.
What if you can only manage one a week?
Then do one a week properly and stop feeling bad about it. One good video every week for six months beats three a week for five weeks followed by silence, and it is not close.
Consistency compounds; intensity does not. Choose the number you can still hit in the worst week of your year, and treat anything above it as a bonus.