This PowerShell one-liner works for me. Just right click on the "Watch on Saint.to" in top right corner of embedded video and copy link. Update the URL in PS line and it dumps to your desktop.
$URL = ((iwr -useb -Uri "https://saint2.su/embed/bOBgmBg_Enu").RawContent | Select-String "http.*\.mp4" -AllMatches).Matches[0].Value; iwr -useb -Uri $URL -OutFile "$env:USERPROFILE\Desktop\$($URL -split "/"|select -last 1)" -Headers @{"Host"="simp2.saint.to";"Origin"="https://saint.to";"Referer"="https://saint2.su/";} -Method GET -UserAgent "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36"