> what exactly "doesn't work"? mpv shows an error or SVP doesn't detect presence of mpv?
Yes, "doesn't work" means SVP doesn't detect playback of mpv. However I found that when I run SVPManager in the background, SVP detects and works well.
> will "chown -R user:group "~/SVP 4" help?
Thanks! It worked! Now I don't need to use sudo command.
("user:group" didn't work so I used my user name)