I found a really nice video/sound recorder ...

[Maliksky]

https://mirillis.com/en/products/action.html

Works great for me, no loss to my fps. Has live streaming to twitch.tv, and outputs files for youtube. You can record video with or without sound. FK9 and FK10. Only $20.
I haven't noticed any overhead whatsoever. You can download it as a trial.

Action!

 

[RAPTOR]

I have had Mirillis Action for almost a year now. The only downfall that I have noticed was that it wouldn't work while using it with Mantle in BF4. I'm not sure if it works with Mantle now (I now use Nvidia), but it would not work with Mantle as of January 2015. I contacted Mirillis about it, they replied saying that it's is mentioned in the fine print that they do not guarantee for it to work with the Mantle API. From there I stopped using it. Since then they have probably had plenty of updates and It may work with Mantle. A simple search on their forums may reveal this info.

 

[sixer9682]

Does it have temp sensors in addition to FPS? I like that on my Play Claw.

 

[Maliksky]

Does it have temp sensors in addition to FPS? I like that on my Play Claw.

Temps, not that I have noticed. For temps you can use RealTemp.