Green Screens are green backgrounds that let you drop in different images so that it appears you are in a different location. Zoom has the ability to switch up your background and I believe that Google Meet will be adding this capability. It's also great for stand-alone videos.
I used a green vinyl tablecloth as a green screen during COVID teaching in the spring. It cost under $5.00 on Amazon. There are also more professional set-ups available.
Touchcast - cost
ChromaCam - free and paid version, don't need Green Screen but need to use their backgrounds in the free version
Doink - cost
iMovie on an iPad or iPhone
Green Screen in iMovie