That video seems to be getting around nicely
Well firstly, I am so not a professional, so feel free not to listen to me too seriously.
As for the technique, I'll bullet point it for clarity
It really depends on what you mean by weak. An extraction of 20%, which I believe the coffee in the video was, is smack in the middle of the desirable scale. If you are referring to the TDS, then the coffee to water ratio used 60g/L, is aso smack in the midrange. If you find you prefer stronger coffee, it would simply require upping the dose weight of coffee slightly.
Subjectively, it wasn't that weak at all. The long stir at the beginning results in a very fast extraction. I was using a natural coffee and th resulting cup was absolutely huge in terms of body.
There is actually very few issues with temp loss, the aeropress retains heat pretty well and the brew was actually quite hot when first finished, I had to leave it cool for a bit before drinking. It was even at a drinkable temperature for about 20-25 minutes after, kept in the decanter with the lid on.
The kettle you are referring to is a Hario Buono pouring kettle, specifically designed for brewing pourover filter coffee. Not a necessity in the likes of press pots and aeropress as you can pour straight from the kettle. I was just using it because it's a pretty neat piece of kit and also has great heat retention. I needed to boil my water off screen a minute or two before I started to pour, so it kept it at a desirable temperature.
It is mainly used in pourover brewing for its great accuracy, balance and ergonomics, makes holding over a litre of water easy and makes pouring a dream.
I certainly wouldn't dump the press pot, there are a number of ways to make the brew cleaner after brewing. Have you ever tried decanting the coffee through a paper firer before serving?
That aeropress technique in the video is certainly showy and would make a great party piece, but it can also be a bit awkward to get the hang of. I actually plan on doing a detailed breakdown video guide soon, probably with an accompanying blog post. I should be doing this about the end of the month. One more video to shoot off first.
If you serve multiple people at once, it might also be an idea to invest in a pourover brewer, they are more scalable, and the average size usually does about three cups. The Hario V60 and Kalitta Wave are two inexpensive examples, both cost under 20 quid and produce amazing coffee with a bit of practice. The chemex is also great, although priced, usually running up to about €50 or so, but is very classy and a great piece of kit.
Hope that helps