Mate, if you really were in to Photo / Video editing you wouldn't be asking those kind of questions.
If you editing a video ones every full moon or when the holly pig flies, you will be just fine with I5 and Gimp.
If you're doing it even on "enthusiastic" scale, you would perfectly know what kind of CPU you need.
Either CPU has enough juice to last you for some time. How long exactly depends not so much on the power of that CPU but rather on development and spread of new technology like DDR5 and etc...
If you compare both CPU manufacturers right now, then go for AMD.
They offer a more superior design right now.
If you want those extra 4% of performance in addition to those 140 FPS in 1080P, then sure go Intel. If you just want a better CPU in general, then go AMD.
But don't bother about video / audio / photo editing, it wont make any difference for you at all.
Main reason for you should be price and availability.