How to connect video between 2 container.

I have:
project1/container1/over1->container(thumbnail)
project1/container2/input1(), input2(constant1) ->over1

I just want to connect project1/container1/over1 or project1/container1/over1->container(thumbnail) as a video input1() in container2. How could I do it?

Please, I really need your helps.

I’m not entirely following your project structure. Not sure what the → and commas indicate. Any chance you could upload a file with the structure you have?

Have you looked into the select TOP? It allows you to specify a path (absolute or relative) to another TOP and places it there.