Hi NesDk
"Wow had thought of it, but believed it was more just filebrowsing." - the app is actually just a file browser, but if you click something that your iDevice knows what to do with (MP3/M4A/MPEG/JPG...), your iPhone/iPad will play/view it.
"Also does using airplay work the way i think, then it first sends from nas to ipad and then send further on to the ATV3 from the ipad/iphone." - In effect, yes. What happens is that the app drags the file from the NAS using SMB (exactly the same way you access network shares at work?) - the app has been written to support airplay, so the app then feeds the file into airplay and passes it to aTV (you have to press the airplay icon in the app)
"Meaning that theres double buffing and chances of frameloss on high quality content" - I don't know how the app's been written / implemented, but that could be the case. You'd have to ask the developer to be certain - they replied very quickly to some questions I had before I bought the app. The usual recommendations apply: use 802.11n, make sure you're using a different channel to your neighbours (if possible), have the NAS wired in on gigabit ethernet (i possible) and keep the distance between router, iPad and aTV as small as possible, to maximise power. Perhaps your router supports QOS, and you could set static IP addresses for the NAS, iPad and aTV, and you could prioritise that traffic? I guess only your ears will know how good it is 😉
"the optimal way (as i see it) is pushing the media from nas to atv via comands on ipad. Or directly browse via ATV3 interface." - that would be nice, but unless Apple bring out iNas, I don't think you'll get that interoperability, because the apple protocol environment is "closed shop" - and I can't see Apple introducing a NAS, because their focus, and the world's at large, is for cloud computing, where you don't own any physical storage. They want to make you do things their way...
"went on "surprise buddy drunken chill birthday party" in the woods, think i'll wait figuring out my port acces setup util the livin room stops moving." - I know what these Danish parties can do to your head - I'd leave the router a couple of weeks 😁
"i'll update your suggestion if i'm succesfull in using filebrowser, or others can confirm and i'll give you the solved bonus star." - Thanks, I hope it does work for you. I've only tested it small scale, streaming music and a small piece of video, from a USB stick plugged into my router. My router's SMB server crashes after about 5 or 6 songs, but I think that's because it's a Netgear router! The developer said he has an update ready that makes SMB problems more resilient.
I would suggest you try his free app first (netportallite) - it will let you list all files on the NAS, but won't play music or video - still, you can try to stream photos to your aTV, and if that works, buy filebrowser.
Let us know how it goes for you.