chrome://settings/content/sound?search=sound
and add vdo.ninja to the list of "allowed to play sound" list&noaudio
to your VDO.Ninja view link, so no audio track loads -- without audio, the video should auto-play. --autoplay-policy=no-user-gesture-required
to the Chrome/Chromium command line to have the auto-play policy changed on load (this may not work with recent versions of Chrome though)