Here is an update about using QT with Adobe digital video and audio products: QuickTime on Windows | Creative Cloud blog by Adobe
Stay tuned to the blog for more information about the solutions and the availability of native support for the affected formats.
Thanks for the link, but it in no way addresses my question.
Surprisingly little on this critical point. The comments on the blog post do speculate, but nothing authoritative. I have found nothing that says the codecs themselves are a problem. I have seen the (in my opinion) misinformation that it is only the web plugin that is at issue.