shape with clear around it

i have this item that i wish to make a video of.
but the surround has to be clear as it is going to be infront of another image on the website.
how do i do that?

then i have to figure out how to do animation of things IN that shape but not outside it?

hopefully there will be dozens of individual shapes on the webpage

please make your guidance very clear as i aint so bright and only use blender intermittently
thanks all

PS other shapes will be oval


tvscreen.blend (572 KB)

It sounds like you’re talking about transparency… Set Render Properties->Shading->Alpha: to Transparent.

that sets the background to transparent
now we need to know which video format does transparency