I'm thinking of an interactive timeline, combined with a world map, which tracks the borders and names of countries over time. It'd be highly educational for demonstrating what the world looked like during a certain time period, and how it's changed through the passage of time.
I had a search but haven't been able to find such a tool. It'd be a great bonus if it can add context of major events such as wars, conquest, significant exploration or migration.
Speaking from both a historical and mapmaking perspective, the kind of tools you're looking for have been attempted before but the results are underwhelming, and often misleading.
From a specifically ancient-history POV you run into issues with societies lacking state structures; you can see this reflected in some of the 'throughout history' map series that have been made by various folks on the internet, and even professional historical maps, when it comes to periods in which this accounts for large portions of the Earth's surface. You end up with demarcated blobs, or maybe with a label like 'Scythians' or 'Arabic Speaking Tribes' in italics that just suggests somebody like that is gestures vaguely in Y direction.
But even with known state societies you will often lack contextual material to tell you their 'borders', if that society even operates with such metrics, let alone changes to them over time. Any time you see the Greco-Bactrian Kingdom marked on even professional maps, for example, the borders that it's given are usually totally arbitrary, let alone its borders after historical attributed conquests in the Indus Region and NW India. And what does one do with, say, the pre-4th century BCE history of Rome, where Roman authors list a whole series of border changes, wars over time but where these are enumerated in much later periods where we have no guarantee of accuracy?
More generally, the amount of data and time to make a resource of this scale is enormous, and to do it properly would require people with knowledge and expertise to actually critically examine source material across vastly different periods and places, especially with the kind of additional context you're interested in. This is why previous attempts at something like this have been generally by hobbyists, or relatively low quality. You will find map series in which 'Mon/Pagan City States' occupy exactly the same space in South East Asia across centuries, simply because the author in theory knows that such states existed in that place but has no ability to find any other context about them and their geospatial existence.
Ultimately, this kind of tool asks history for kinds of certainties which don't, in many cases, exist, or encourage flat labels that often preclude much more complicated realities. This would limit even a high quality attempt at such a project, and such a thing would have to be undertaken professionally to assemble the kind of resources needed to do it properly. Given the inevitable limitations, and the kind of false perspective such mapping can encourage, I suspect you would run into issues with professional historians and archaeologists not wanting to dedicate so much effort for something that doesn't necessarily advance general historical understanding.
Maps are a fun and intuitive way to visualise data, but they also pronounce certainty and make decisions about what they depict, and a large chunk of even known human history doesn't lend itself well to being subsumed like that, much as I understand why you're interested in finding a resource like this.