I'm not quite sure what you mean, but I'll re-explain and hopefully my answer will cover it.
From VLC itself, you can take a screenshot. However from a remote app (
Remoti.co OR
VLC Direct Pro) you can't take a screenshot. Media Player Classic Home Cinema allows for you to take a screenshot while using Remoti.co and it's saved to the phone/tablet/device you're using the remote app on.
I'm requesting that apps like Remoti.co be allowed to take screenshots of what's playing on VLC.