Studio Ghibli, a renowned animation film company from Japan released a set of background images to be used in video conferencing software like Microsoft Teams and Zoom. You can grab the backgrounds from here or the official Studio Ghibli website.
FYI, Netflix started streaming films from Studio Ghibli earlier this year. You may want to check out this post on Wired to learn more about the films.
💡 Step-by-step guide:
How to Add a Custom Background Image in Teams App