Coolemad

2700x, will make a noticable difference in editing and streaming and is worth the little performance you lose in gaming.

Definitely the 8700K - It's much better for gaming, and holds it own - or beats Ryzen 7 - in productivity

Intel 8700K is slightly better at gaming and can overclock high. It is better at singlethreaded tasks.
 
AMD Ryzen 2700X is better at productivity and multithreaded workloads. It will perform better when streaming as it can encode faster. It should also perform better at other stuff like rendering.
 
Note that if you do go with the Ryzen, you should focus on getting a great motherboard like the ASUS Crosshair, and high speed RAM (3200MHz +) for best performance. RAM speed and timings affect Ryzen greatly (we’re talking 20% improvement with faster RAM here), while with Intel you can usually get away with slower RAM.

i7 8700k would be the best option. Especially if you're using an Nvidia GPU, because you can just use that to stream/record and Cuda Accel is nice in Adobe as well.

Between those two, I'd personally choose the 2700x. The 8700K will be better for pure gaming, but the difference is negligible when running games at realistic settings, as your graphics card is far more likely to be the limiting factor. The 2700x will also have more headroom in terms of streaming and content creation, not to mention the platform longevity of socket am4.

Gaming only -> i7 8700k
Gaming + Streaming - i7 8700k better for streamer but worse for viewer
                                  - R7 2700X OK for streamer and great for viewer
Video editing - in Premiere Pro with the new update for iGPU use, the i7 8700k will be better but in other software it depends, most likely the R7 2700X will be better but if you need to use AVX a lot the i7 8700k may have a slight edge with an OC.
 
Graphics productivity like Blender for example -> R7 2700X is better... but it comes down that what SW you use

Actually Ashiella you'd be surprise to know that now that the latest updates allows the i7 8700K to hardware accelerate with its iGPU it is better performing at content creation than the Ryzen alternative.
 
Video Editing and Rendering for instance the "workstation" workloads that would often be the remaining selling point of a Ryzen product are no longer true as the i7 8700K aid by its iGPU is now faster and better at these tasks:

Not to mention that Intel still has the most stable product, Ryzen often has compatibility issues, my brother knows it well he is just waiting for the 8 cores Coffee Lake to replace his current Ryzen 7 1800X: