Currently this fanartImage is set by the user in recording
post-processing. So, a "%U" format specifier gives the user the
uuid of the recording and they can use api/idnode/{load,save}
to add fanart/image artwork from appropriate sources.
This fanart is then displayed in Kodi via pvr.hts.
const char *image = dvr_entry_class_image_url_get(de);
if(image && *image)
htsmsg_add_str(out, "image", image);
+ /* htsmsg camelcase to be compatible with other names */
+ image = de->de_fanart_image;
+ if(image && *image)
+ htsmsg_add_str(out, "fanartImage", image);
if (de->de_copyright_year)
htsmsg_add_u32(out, "copyrightYear", de->de_copyright_year);