Since you mention the "video" word, if you're using integrated graphics, perhaps the biggest consideration would be to choose a CPU that has 530 graphics rather than 4600/4000/2500 series and older. So 6th-gen of either series.
Personally, I'd go with I5 simply because the pricing in a desktop can be very similar but you get 4 cores instead of 2 and the same power consumption. But i3 processors also get the job done.