Some observations from the video and other pictures:
it does look like they landed on rwy 27, no doubt about it.
You can see the smoke from the fire indicating a westerly wind of about 10 to 15 kts.
The wx to the north seems to be fairly ok, but the view to the east ( the rwy 27 approach ) does seem to have quite reduced vis in heavy rain.
It's still raining when the video was shot and the Finnish survivors are all dripping wet.
It's been a while since I've flown in HKT, but it can be a tricky place in bad wx.
I have several mates that have had a few heart stopping moments trying to land in HKT in 767's. Due to x/wind and rain.
The rwy is not grooved and QF forbid landings in mod to heavy rain.
My condolences to all, another sad day in Asian aviation for all.
Seems it might be time to actually enforce some rules.