According to Upwork support, they do something like this before a contract is actually signed. But in my opinion that's way too late in the process - someone impersonating me could completely ruin my reputation before any contract is handed out
I did one gig on Upwork and at no point I went through a process like that. The client invited me to their Slack, we discussed some more then they accepted the proposal and I did the work. At no point I had to do a video verification step with Upwork itself.
Nextgrid|3 years ago