Did it once, in Lisbon, and I'd do it again only under very specific conditions.
It worked in the sense that the flat was real, the landlord was honest and I got my deposit back. It didn't work in every other sense. "Quiet street" meant quiet at 2pm, when the video call was, and a bar opened underneath at 10pm. The "bright" bedroom faced a wall two metres away. None of it was a lie exactly. It just wasn't the flat I thought I was renting.
My rules now, for your friend:
- ask for the video call at the time of day you'll actually be home
- ask them to open every window and point the camera outside
- ask the neighbours, if the agent will let you speak to anyone
- only sign a short initial term if you possibly can
If the market genuinely doesn't let you wait, those four things at least shrink the surprises.