"Reading a bit more, for example the link mentioned by @Don, would help.
The basics are that video (camera and OSD) are separate from the APM and do not use the XBees. The data is added to the video stream and sent via the video…"
"Actually i am planning to use APM and also i need OSD so how would i get the things ...so what kind of camera required for this purpose so that i can connect to it..thanks for above suggestions please help me regarding this i am confused ."
"Please state clearly what you want to do. There are a lot of options and ways to get something done. OSD requires a camera, so that there is a video feed to add it's telemetry to. This is mostly for FPV...
Another variation of OSD is done in…"
"Your video camera doesn't connect to APM and cameras do not provide telemetry... it gets connected separately to a video transmitter of your choice.
Also, using ALL CAPITAL LETTERS is really quite rude and unnecessary."