Issue summary: 

• Cache-Control headers for video files on the HTML page ignored
• Requests to video files are bypassed and do not reach the Service Worker 
   

Case description:

We made a Tizen Web App for TV that receives the URL and plays it in the iframe. In the iframe, we load a page with a slideshow (images and videos). 

After some testing, we noticed that regular browser caching(Cache-Control headers) is not working, which creates huge traffic. With 3 small (5 MB videos), we have got something near 1Tb per day if we keep it to play for 24h.

Trying to overcome this issue, we have created a version with a Service worker what did a precaching of all images & videos for the slideshow. But it works for all requests except requests to video files(mp4, WebM). 

Somehow video files are bypassed or processed differently by the Tizen browser.

Here is a summary of what we have already tested with no luck:

• Set headers “Cache-Control: max-age=31536000”
• Use Service Worker to precache and serve video
• Place just one <video> on the page and 
  • Set loop attribute
  • Call .play() every 10 sec.

The result is the same for all cases => video(s) loads over the network every playtime.

Please advise how to get caching working for video or any alternative workaround ideas applicable to this case.