Is it possible in the bnet launcher?
Or are they still sold in brick and mortar shops?

You gotta download off the battle (.) Net website.

Go to "Diablo 2 Resurrected" and scroll to the bottom of the page.
Download the install package direct from the website, the CD keys will be linked to your account.

My buddy had a glitchy video for some reason, putting -w in the file target thingy fixed it.(aka playing windowed,not full screen)

Lmk any other questions