Easiest way to get natural lighting is to set up directly facing a window. Have the camera higher than you think. It should be eye level or slightly higher.
For general purpose interview tips, beforehand, have a couple good stories of your contributions lined up and ready to bring up. Think of examples in terms of SMART goals, because thats usually what your goals are going to be when you get to the job. Simple, measurable, attainable, relevant, and time bound.
Also, they're going to ask dumb interview questions like think of overcoming an obstacle, overcoming teammates personalities, etc. So have answers for those that paint you in a good light while not sounding whiny or one sided.
For technical interviews, I always try to stick to the following storyline of examples:
- discovery of problem
- finding out root cause of problem/diagnosis
- proposed range of solutions
- advantages of proposed solution in terms of improved performance, dollars saved, time saved
- execution of solution, show how you stuck to original scope and fought off scope creep
- knowledge sharing/documentation efforts
For engineers, showing how you methodically came to an solution is as important, if not more important than the answer. Because you can get lucky, and the interviewers don't really care about how that project example turned out. They are trying to see if your success stories show you can learn how to drive success on their problems.