It sounds like your question is less about video counseling and more about wanting an appointment if the roads are bad but not wanting her to feel obligated to see you. I think you just have to ask for what you want. I don't think your T will offer you something that she doesn't want to do, and if she does, that's her problem to work on. If I were worried, I might say, "The roads are too bad to come in, but I would still like to see you via video chat. Would that be possible, or are you not able to work today due to the weather?"