Hi there - Lindsey here from Support. I hope you're well notwithstanding this issue!
Based on the screen recording you've provided, as well as testing this on my end, it appears that this is a malicious redirect that has been enabled on the site which is causing this redirect.
This is normally from an unreliable plugin or a recent plugin update which has added this redirect. To help pinpoint where the redirect is coming from, have you added or updated any plugins recently or around the time that this redirect began to occur? Any information you can provide will be helpful in finding where the redirect is coming from.