What's fake about that? I routinely use a soldering iron on surface mount parts. 0.5mm pitch ICs is quite doable with the right tip & technique. When shooting videos like this, it is often a staged scene (i.e. not real work) to make the shoot clearer or the company doesn't want to show what's in their product. Think of this a stock video footage. On the ridiculous side, I use a toaster oven to solder surface mount parts when the pads aren't accessible to a soldering iron tip.
It's not unusual to use a soldering iron to reflow a joint that does not look too good, or remove excess solder after repairing or reworking a board, including on surface mount.
Example - see the photo below. We had to fit the larger IC near the centre of the photo by hand in a batch of PCBs, as the surface mount assembly company did not have stock when we needed the boards.
They were initially soldered with a hot air tool, then any bridges or joints that did not look to have flowed properly fixed with a temperature controlled iron.