Can you tell if someone is in a video chat on Facebook Messenger?
Unfortunately (or fortunately it depends on your point of view) for reasons related to privacy, Facebook does not allow you to know when a person is actually chatting with another person, much less with whom.
Can someone video you on messenger without you knowing?
Facebooks new Messenger app has spared privacy concerns after a list of Permisssions appears to show the app could be taking video of users in secret, according to the Washington Post. A list of Permissions appears to show the app could be taking video of users in secret, according to the Washington Post.
How do you check Messenger video calls?
Messenger desktop app for Mac and Windows From the chats area, open a conversation with the person or group you want to video chat, and then click the video call icon (see above).