So I'm just wondering, is it a plus if a beta tester also provides good coverage on upcoming games, say in a hand on preview video that gets substantial views?
NDA stands for Non-Disclosure Agreement. Basically, when you're beta testing something that's not publicly available, often the developer wants to control the available information about the product. Often there is an explicit NDA in the form of a signed document saying that you won't give out information about it, or sometimes it may be implicit, in that there is nothing on paper, but the developers have stated or implied that they don't want anything getting "leaked." The short answer is: ask the dev if they mind if you post videos or pictures before you do it.
Oh well of course, I'm not leaking anything I would most definitely ask first. lol I was just asking if small developers would like a little hype for their new app, and that I might be able to do that.