Can I use Chromecast with my Samsung Tablet E?

[Packard59]

I have a Samsung Tablet E

I have a Samsung Tablet E and it does not have HDMI capability, so I would like to use Chromecast but I don't have access to internet, can I still use Chromecast. I have downloaded movies to my tablet and want to watch them on my Sony Bravia and Hisense big screen tv, do I need internet to do this.

Thanks
Packard59