To be accurate, they don't know either. A login key and a decryption key are derived from password and secret key client-side.

Only recently discovered CRD, but he's quickly becoming my favorite channel. He's doing the exact kind of deep dives into obscure tech topics that i love.

Despite it being funny, beta didn't lose over porn. VHS with a larger tape length captured consumers with ability to record for longer.

Both formats were at first for home tv recording, pre-recorded distribution only came once many households had VHS and this was viable. The formats weren't designed for it.