Is it possible to override a plugin template from a theme template?

Describe the issue or problem
I’m customizing the block template of the Web Feed plugin:

I’d prefer not to do changes in the original plugin files, but at the theme level.
I know how to override a core template file with a theme template file. But I don’t know how to override a plugin template. I’ve tried to copy the block.tpl file in /themes/bootstrap/templates/block.tpl but it doesn’t work. Any idea about how to do it?

What application are you using?
Bootstrap theme