It might have something to do with Windows media player as well or Windows 10 update, as it may have memory leak for example, that being said if it’s on ~70%, while that’s not low it should not cause problems.
2G memory with Windows 10 is certainly not much, although as I said it should be ok in most cases.
You can enable additional logging/auditing on the player How to get a Windows Player log for advanced debugging (please read it carefully and do use separate display profile for it)
The path does not need to be Xibo Library/log.txt it might be somewhere else, but library in most cases is a good place to save those logs.
If you will then send me the logs via private message, we will have a look at them.