Does the webos ipk save the video in TV memory or stream the video online?
I have edited your post and moved it to correct category, as it did not seem like a feature request to me.
To answer your question, it depends which widget you’re using.
If you’re using Video module on your layouts, then the video is sent from CMS to the player which saves it in its local library.
webOS players can also stream videos via HLS/local video modules.