Peacock works fine on content loaded before February. There's no problem with commericals. I downloaded several TV shows and a few movies in 1080p with a "Premium" account, which despite the name is the basic with commercials account.  It does log you out periodically (don't expect to download your entire queue on one login), and if you are logged out, the video will be in "Analyzing" mode until you go to the Home tab and log back in. You'll know you were logged out because the Peacock tab of StreamFab's Home tab will be displaying the login screen. Log back in, then identify yourself as Account Holder (and not Kids), and the download will proceed.