You mean this `systemctl kill -s HUP rsyslog.service` ? This just tells syslog to reload itself
And since we're all amateurs here who don't understand what VirusTotal is doing, some of us think "ZOMG yt-dlp compromised?!?".
If you look at the process tree, the process that reloaded rsyslog wasn't spawned from the yt-dlp_linux process.