The files you have highlighted are all in the Khan Academy article and scratchpad formats, which are very specific to the rendering on the KA website and not currently supported offline on Kolibri (or KA Lite).
See previous thread here
Proper rendering of the article and scratchpad formats will require significant development effort so we have not started on this project yet. I’ll interpret the exclamation marks in your screenshots as a positive vote for developing this feature 
Thanks for your input.