The best place is inside:
Place the camera on the wall as far up as you can to capture most of the interior.
Try to get all the entrances.
Also, chose an entrance door you will leave from, then set the safety lock on all the other doors.
This way, you have a chance of knowing what door is quick and easy to access.
You can use your camera outside, however, the weather does play a great part on the clarity.
Legally, they have to enter the home and be captured inside before they are prosecutable.
They do not even have to remove any items to be able to prosecute. Breaking and entering is breaking in and entering the facility. Illegal, procecutable by all types of levels in different states.
One key factor to Xfinity Home working is your consistent access online.
It is true. These features are made to work for you. Therefore, they want you to be their buddy and let them work while you access their features. Took me a couple of years, two homes and several break-ins before I realized, I must make the camera's and alarms work by monitoring them remotely from my Xfinity Home internet log in.
Delete excess pictures and video's, there is a limit and the units will stop working.
Good luck and enjoy.