here was another quick and easy

Shout out to Gatorfreak, he made a simple reliable service add on to be able to save the play position and resume it on reboot

https://github.com/Gatorfreak/service.autoResume

Download the zip, install on openelec with the "install addon from zip" option, then set the save directory to /storage and set the save frequency to whatever floats your boat ( I used 15)