F the word "Miraculous" Taipei plane crash.

[JuliaL]

It appears that the incorrect, working engine (left) was shutdown, whilst the other was producing idle thrust only. The crash could have been caused by some sort of non standard technical problem with the engines causing complete confusion and the wrong engine to be shutdown or perhaps something else entirely. Normally these crashes have a few contributing factors.

The aircraft looks to have stalled, with a wing drop to the left as the right engine was still producing some extra airflow over the right wing. At this point it is essentially uncontrollable without consierable height to recover from the stall. It could have gone below Vmca (min controllable speed with the rudder with one engine only), but this doesn't look like that from the video.

My bolding.

I fully agree with your assessment based on my limited information.
Where did you hear that it was the right engine which failed? All I heard was the report of a flameout without specifying which side.
I expect the pilots will be found to be at fault in some way though how is yet to be determined. Single engine out should not cause loss of control without some other failure. None appears to be obvious from the dashcam video. The nose high, wings (nearly) level at the beginning of the clip followed by what looks like a stall/spin entrance to ground impact seems pretty damning of the pilots to me.