He is a Korean ultranationalist (I suppose) whom also supports PKK/YPG and to add all on top of that, HE CLAIMS THAT J-20 IS BAD AND KF-21 IS MORE STEALTH THAN J-20.
Please don't take this account seriously, he is an "expert" by no means
As you can see, most of the stuff is done by body thickness and engine cooling intakes (which is not related to engine)
TF-X with F110 will definitely be better than F-16 or some 4.5 gens but won't be good as F-22/F-35
Well it is also related to intakes, F-15EX with same engines can go lot faster than 1.8mach, but has a variable ramp, F-22 also has it but it affects RCS iirc
Well, at this photo KF-21 had her engine integration etc, maybe we can see a photo like this in January, engine integration for TF-X is planned around this December
in all the aircraft I have seen, they do not open facing towards the nose but the other, backwards?
Why's that?
Also sorry for not so well structured sentences, I am not in a desirable situation rn
my guess is an auxiliary air intake for high AoA manuevers in which normal intakes would not be able to supply air into the engine and would lead into stall, thus allowing aircraft to perform much tighter maneuvers
if not these, it could be an APU exhaust