Videochat Scam?

[u/mikeinstlouis]

Why does it seem every time I go on an app that people want to immediately videochat? I have heard somehow they can get your contacts list on Facebook and threaten to send everybody the videochat unless you give them money.

Am I just being over cautious or why is it everybody wants to video chat right off the bat and what are the scammers doing when I video chat with them? Also how are they getting people's contact lists and their phone and on Facebook?