Adding display groups in Xibo CMS 1.7.10 does not make any result

I am using CMS version 1.7.10 with client version 1.7.9. How to add the videos in the layout using Display Groups?. I have already created the Display Group and added some displays in it. But adding media does not reflect on the display output. I am having almost 60 displays configured with different layouts containing 5 regions.