Definitely dress professionally! I ask mostly because some interviews are done online specifically to see how you would handle being on webcam. In this case, it's blended, so a suit top with fuzzy slippers is out. Currently, I'm in an in-person setting (I've always hated the term "brick and mortar") but with the high hopes to help implement an online component for our students. It wasn't specifically leaving online teaching, but moving from one school to another to open some new opportunities for myself (including going for my administrative license).