There are some bulletproof settings to start with - and they’ll be as quick as possible:
(HD above - 480p below)
(265 on 480p is a waste of time - 265 on HD material isn’t a waste of time - it just takes a lot of it)
265s will be exactly the same - or at least like this:
… and you can make the bit rate as high as you like. That’s ‘My’ Bit Rate. Your’s may be different, but I suggest you at least try a few 240 second Previews - in an Other Videos Library - so you can test them on everything you have and look at 'em.
