While i don't know of a similar tool, i hopehthe following bit of info may be useful to you.
Usually, engagements of a channel (such as comments,likes and shares) come from its subscribers.
While there is no way to tell who liked or shared a particular video, you can see who commented, this is useful because you can make a simple bot to scrap commenters info, such as the country and interests. With a small analysis you will get an idea of what constitutes the majority of its subscribers in order to target them.
Good luck