In 'Stucco', our main character is afraid of leaving her house. She has a conversation with her boss who is growing weary of her absence via zoom. This over-the-shoulder shot shows that she is looking at and focused on the computer and her boss. Its use conveys that this is important to the character, and helps reveal to the audience the pressures that the character is under.
This is where the camera is positioned behind a character and looking over their shoulder to see the subject that the character is looking at. The shot size usually is described by the framing of the subject, not the characters shoulder. This is used to connect the character and the subject, similar to a 2 shot and POV shot, and is often used in conversations.
This over-the-shoulder shot used in 'Banshee+' connects the girl to the ominous forest as she absorbs her surroundings - its use shows the size and isolation of the forest, and that she is heading into it, and away from safety.
An over-the-shoulder shot can also look behind a character, revealing what is happening behind them. This is a shot used in horror to show the audience something that the character can see, and thus builds tension because we can't warn them. Here, a ritualistic use of candles surrounds our paralysed main character showing that she is vulnerable to something supernatural.
A very standard use of over-the-shoulder shot in 'Kookie' whereby a conversation happens between mother and daughter Bree. By looking over the daughters shoulder we can understand that the mother and conversation is her focus and important to her - the low angle also conveys the mothers authority in this conversation.
This is a less conventional over-the-shoulder shot in 'Kookie', where the mother is worried about her Bree after the babysitter was spooked and couldn't leave fast enough. This shows that the mother is not her focus, and her worry is not important to her. This increases tension because we wonder what does have her attention, and why that spooked the babysitter.
In 'The Smiling Man', a girl finds a mysterious balloon and when she examines it, the use of over-the-shoulder shots shows a second balloon, making us realise that this is a classic cookie-crumb trail to lure a victim into a trap. The use of this shot shows that she is focused on the balloons and is falling for the trap.
Another standard use of over-the-shoulder shot in a conversation in 'Smiles' - a standard conversation between two people who are focused on each other, which shows the conversation is important.