No sorry I think you miss understood , I Do Not See any pink Hi lights in those apps at all just in your new app.
I think maybe some how you are clipping the hi lights in the mlv raw decode ? or the conversion to 8bit color space ?
Just a thought 
Ok I completely understand what you are saying now: the clip does not have blown out highlights (according to you)
I decided to investigate a little bit... (thank you for sending the clip)
Here's MLV App handling it:
...not too well
I tried opening it in RawTherapee, and looked like no highlights were blown:
But then I turned off highlight reconstruction, it suddenly showed the highlights had no detail, similar to my app:
However they were not pink like MLV App, but white instead, it is probably doing some kind of equal clipping.
Then I opened it in MLRawViewer, and the highlights looked like this:
The brightest highlights had discolouration, suggesting MLRawViewer is reconstructing them.
Then I looked at highlights in darktable RAW converter:
And results were similar to MLV App.
So I have concluded that the highlights in that video are clipped, but all of your software did a good job of reconstructing them (leading you to believe they were not clipped).
Thank you for starting the whole discussion reddeercity and sending me the clip, so now I can be certain that MLV App needs highlight reconstruction.
... the reason clipped highlights are pink is that green channel clips first.
If anyone has any links to info about how highlight reconstruction works, it would be greatly appreciated, but I think I have an idea of how it could be done.
@DanHaag, unfortunately I can't help at this time specifically, as those errors are hard to track down... especially when someone else is having it,
but that kind of error tends to eventually get resolved over time as the app gets more stable (from my experience).
If you want, you can send an MLV sample that causes problems for you and I can check if it's the file causing problems or not.
