I've looked at many videos for you. This is one of the cheapest and easiest:
Was wondering if you want to observe the birds or watch activity around your property.
My son built his own birdhouse and put a shelf where he could install a camera. They caught the guy throwing out empty beer cans in their complex that way. It recorded his tag number and gave the film to the police. They had a serious talk with the man and he stopped that activity.
Thank you for the information;