`Thread 1 "deepin-movie" received signal SIGSEGV, Segmentation fault.`

#1 0x00005555556d1706 in dmr::MpvProxy::my_command(mpv_handle*, QVariant const&) ()

Only one search result partially mentions this issue: https://github.com/linuxdeepin/deepin-movie-reborn/issues/17

But it’s a closed issue from months back so I’m presuming that this issue is related more to mpv: AUR (en) - orion

No … it means its ‘yet another’ problem related to deepin.
They use a debian-based frozen pool development that they ‘kind of’ keep open source, but certainly put their own individual spin on … so mpv was updated … and now you can wait -insert time- until deepin cares. (which may be a while … and then … they might decide to fork mpv … time will tell)

It seems that deepin has fixed the issue, but not made a new release yet…what happened to the AUR version that pulled the latest from the git sources?