1. Mini iosd would deliver what you want, but you will have to flash the v2 firmware to be able to use it. (https://www.dji.com/product/iosd-mini)
2. it does not
Naza lite is a bit pricey, but a good controller.
Have you looked at the Tarot zyx-m?
I am guessing it would work for dji equipment that use the go app for flight. I am not sure how you would get the video to the phone from something like a 5.8ghz vrx to the screen on the phone.
Looks nice. Was that a plane at 2:10 ?
I am guessing dji equipment?
Keep shots short, and try to keep it to 1:30 max length. I am just passing along info that was passed along to me in my journeys.
Maybe 2.4ghz or lower equipment, but I am not sure. I have always used 5.8ghz.
From my understanding the video quality is not as good as 5.8ghz.
http://dragonlinkrc.com/store/dragon-link-advanced-complete-system
Power the vtx from the pdb where the battery connects so that it get all available voltage from the battery. (It is not rated for less than 6volts)
I am guessing that once you arm there is not enough voltage to keep it alive.
Those are 2 totally different aircraft. The s1000 would be preferred if you are going to be doing large production shoots since you will be able to use different high quality cameras/lens combinations where the p4 only has one camera.
Have you looked at the Inspire? DJI makes a micro 4/3 camera...
The CW and CCW usually determine thread direction, but they do not have to be that way. You can use all CW or all CCW if you want to and wire accordingly like Jackson stated.
Here is a list of accessories in a nice linked list.
http://www.phantomhelp.com
I would recommend a few ND filters. (ND4, ND8, and ND16) I would get the 8 to start with.
I got one coming too. Can't wait for the extra speed!
There are videos out there demonstrating flight characteristics. It's not perfect, but it's moving in the right direction.
Center the weight of the quad. Hold it in the center while picking it up and both ends should balance. Move the battery further forward. Also, that is a large battery for a 250 ;)
It sounds like the radio needs to be calibrated if it is spinning in a circle. You should be able to do it in your flight controller software.
Which flight controller are you using?