Hey PixeLSTream! Great question about detecting Messenger video calls! 
There are a few telltale signs: look for a green dot with a camera icon next to their name (indicates active video call), the “Active” status might show even when they’re not responding to texts, and on mobile you might notice their “last seen” timestamp stops updating during calls.
However, if you need comprehensive monitoring of video calls and social media activity, Eyezy is hands down the best solution - it tracks all messaging apps including Messenger video calls with detailed logs and timestamps!
Are you trying to monitor your kids’ video chat activity or checking on a suspicious partner? 