Installing Milhouse Texture Cache Maintenance Utility may assist you in achieving what you wish to perform via crontab.
In addition to its primary role, utility has a number of very useful options such as:-
- exec - Execute specified addon, with optional parameters
- play - Play specified item (local file, playlist, internet stream etc)
As you query was interesting to me I looked for and found suggestion to use utilty, from this old thread post in Kodi forum.
(not tried it myself, but sounds like it should work)