Black Hole
May contain traces of nut
I used youtube-dl to pull down a YouTube video, which resulted in a 122MB .webm file. Of course, the 'FOX won't play it (even if renamed to something it recognises), but VLC (on Windows) and iOS will. Using iConvert to turn it into .mp4 resulted in a 4GB file, and VideoReDo doesn't recognise it.
ffprobe (on the HDR-FOX CF command line) told me nothing useful, output attached (from the stderror stream - doesn't ffprobe output on the stdout stream?).
Here's what VLC says about it:

What do you suggest I do to make this playable on the 'FOX, while retaining a reasonable file size?
ffprobe (on the HDR-FOX CF command line) told me nothing useful, output attached (from the stderror stream - doesn't ffprobe output on the stdout stream?).
Here's what VLC says about it:

What do you suggest I do to make this playable on the 'FOX, while retaining a reasonable file size?