OMG the typos I made. Sorry, blind.
Yep, climbing up on a roof is by far the easiest solution; however keep one thing in mind. Once you put on goggles, you're effectively blind. Like 100% blind and oblivious to your surrounds.. and possibly forgetful that you are on a roof, and maybe even possibly prone to losing yoru balance. Not what I would call safe at all, even for someone like me who's been climbing trees all my life. So if you do this method, I suggest sitting down Indian Style on the roof. That will keep you from walking in any direction. You could put a lawn chair up there if the roof is flat, but again, your tendency might be to stand up "too get more range" and then lose your orientation or balance. Seat belt yourself down?
For the coax method, find out what kind of cable your VTX might use, for a very small run. Like an extender cable maybe someone sells for 5ghz VTX recievers, like used on the tracking antenna setups where the antenna is mounted on a tripod wth a direction tracking motor. Once you find the ohms you need (I don't know off hand for 5ghz video, sorry), you can go hunting for a much longer run that will have two male ends on it (the pin determines male or female, not the outer jacket of the connector - smart tip to know). If it doesn't match what you need to screw into, you can always buy an adapter of the right size off ebay for a few pennies... i.e., female to female adapter.
If you're running Crossfire or LRS, you may only need to extend your video signal if you're using analog video. You could go out a window and up the roof, or down a chimney and out with your cable(temporarily).
My better advice though would be to find some place to fly where you didn't need to do all that. There are other things to keep in mind when you are starting out flying, or just plain flying... like, how easily will it be able to recover your quad and find it if it goes down.
I had about 200 or so flight hours in the sim when I made that video and had a reasonable grip on Acro mode by that point. 3,000 hours later now, though, I would not have made that flight without more flight time in the sim. As careful as I was with that brand new $500 quad, my first, I ended up destroying it a week or two after I got it home on the bench simply by mating the battery connectors backwards. Yeah. Something the shills in the Youtube videos hawking products for eyeball views don't tell you.
My very first flight, I got on Google earth, and looked for the biggest wide open space of nothingness open empty field to do my first maiden flight in. And I stuck to flying along a road or tire tracks.. if it went down for whatever reason, I could follow the road or tire tracks to retrieve it, and I would be fighting through briars, forest, swamp, people's back yards, or hills and valleys. For a first flight, I had literally no idea what the quad was goning to do.
So if you fly quads, find yourself your own "White Sands Proving Ground" of empty nothingness in all directions for a testing range where you'll test fly a new quad. It should be wide open and flat in all directions. You're going to want to get your rates right in the simulator first, spend many, many hundred hours doing that (most guys never do, and it shows in their flights) then... in your first flights, record blackbox data so you can tune the filters and the PIDs later... there are complex videos on how to do that. The defaults for PIDs though should work pretty good. The defaults for Rates - um, no. They are place holder values. Its frightening how many guys fly clueless, and have no idea they ever needed to tune their pids, and are flying the stock ones which are downright... awful. Yes, ever many of the pilots you think are really good. Clueless about rates.
So, here's my own White Sands proving grounds... which is actually, not far from an ancient old WW2 auxilliary field... don't care abotu the flight, but note how... empty the place is. That's what most of you beginners will want. A wide open desert or farm country. Get out of your backyard, get in a car, and drive.
You'll notice I don't haveto climb on any roof tops, make any cables, etc. Even so, I had the vtx power set to the bare minimum from the bench at 25mw.. instead of 12000 mw. So if you want to know how far DJI goggles go on a the absolute lowest setting of piddly 25mw, there's your range video.. about 2km LOS.
I dont' recommend flying in a suburb or city right from the get go, because you literally nave no idea what is going to happen... it might drop on a failsafe, it could fly away, you could land on someones roof or in their fenced in back yard with a dog, you couldd rop of the sky and hit a moving car windshield, etc.. find yourself a good wide open test range and call it your own. Once you get all the bugs out of a quad and bugs out of your own skills, you can try more complex environments.
