Transfer them via USB to your computer. Then upload from there.
When you highlight a screenshot in the capture folder on the PS4, press the Options button and you'll see "copy to USB" then choose which ones to transfer.
In the year of our lord, two thousand and seventeen, i have to use a physical flash drive and transfer from a PS4 to a PC? Is that seriously how everyone is posting these?
That seems cumbersome. Appreciate the insight though. I'll have to look, i'm not even sure if I have a usb drive somewhere. I've been using google drive since.......ever it seems like.
Nice shots btw.