TVision relocating to another tv

Here's what I'm trying to do.  I had my tvision device connected to my primary tv.  This tv had 2 hdmi ports and one port was connected to my main directv box, the other hdmi port was connected to the tvision.  I ended up replacing this tv with a smart tv so I wanted to be able to stream on my bedroom tv.  The bedroom tv is older and does not have any hdmi ports.  The secondary directv box is connected to the tv with the red/yellow/white cables.  I purchased an adapter that was hdmi jack on one end and had the red/yellow/white cables plus an s-video cable.  The tv has an open s-video port and I thought the s-video port would allow the connection.  No luck.  I've tried numerous connections with different inputs.  Will I be able to use the tvision device on this tv?  How should I connect it?