callbacks in Mac video player?

[hh]

> Richard G. wrote:
> The Dictionary says callbacks still work on macOS, but it
> also says they're supported on Linux, where I don't recall
> callbacks ever being supported, and for several years video
> playback doesn't work at all.
> I can't make callbacks work on macOS Catalina using v9.5.
> Should they?

Yes. But they don't. Use 8.1.10 or 9.0.5.
TMHO 9.5.0 has effectively "beta" status.