Screen replacements. Or any type of phone disassembly. This is NOT something I would recommend anyone try.
But I have come across plenty of people who have said they’ve had to replace screens themselves so I guess there will be people out there who might find this useful. e.g. if you smash the screen and it needs replacing. Some places might charge an arm and a leg for repair.
Note, this is not covered in your warranty so be warned in case you break something.
Fortunately in this video, you can see just how to take the screen apart properly.