Normal FDNY arrival time is usually under 5 minutes from the initial call.
E293 about 4 blocks away; 294/143 about 11 blocks east. Just from viewing, I would think there had to be an accelerant used for fire to be that advanced in arrival.
I think there may have been a lot of material on the porch ?.....also in the LL video neighbors are heard in the background talking about Christmas lights still being up.