For instance, automatically make a 1080p optimized version of a 4k video.

This is already done, explained here: https://support.plex.tv/hc/en-us/articles/214079348-Example-Media-Optimizer-Usage

The keyword is automatically, I know it can be done manually.

Ah, you may want to elaborate on that in the main body. That’s actually a good idea.

The only issue I see with this is crippling your PMS from being able to stream without buffering. Unless you PMS box can support 4k transcode and watching a video at the same time this could be problematic as creating an optimized version takes as much CPU as transcoding a 4K. I always move media …

Automatic Optimization based on video quality

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Automatic Optimization based on video quality

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