Batteries have elaborate protection systems, both inside the device and within the batteries themselves.
Not sure about nowadays, but one protection feature made it so that a completely dead battery would not receive any charge.
This prevented a number of issues that could arise from trying to charge a battery that had a major fault.
The problem with this arises when the user runs the battery too low, and then the device will not charge it.
This is also why manufacturers recommend to not run the battery down completely.
That being said, modern devices normally turn themselves off before a battery reaches such a damaging low level.
This, and the age of the device, leads me to think that the battery is kaput.
There are videos on Youtube about how to remedy the issue, but this would most likely be a temporary fix at best.
There are/were other methods as well, that did not sound as safe.
Even if you can get it working again, I still see a new device/battery in your future, so prepare for that by backing up any and all important files, photos, videos, documents, etc. ASAP.