The idea was slightly different, in that the drone for example would be sitting at the bottom of the page, floating above the page in a layer. Then it floats up on a set path and the user can click it at anytime and the drone i suppose could return to its start point but it will be hidden anyway by a lightbox layer containing the video.
You could position:fixed it to the bottom of the page and then animate it over the viewport.
I just borrowed someone else’s pen of a drone from codepen (there are many others) and then animated it over a background.
Just use your own drone image or svg as required or use the one from codepen after checking any license issues (of which there are usually none on codepen - although a thank you to the author may be nice.)
You can then set your js to open up a modal when the drone is clicked.