My Smart TV (Sony Bravia) used to display photos and video clips from my Seagate backup drive before I replaced it with this Western Digital device which displays a “Tilgin Media Server” labelled HG 1262a DLNA Server ever since I connected the WD device, but claiming it has no media in it.
If you have a My Cloud Home device, see the dedicated subforum for the My Cloud Home. The My Cloud, the subject of this subforum, is a different device than the My cloud Home device.
Also see the My Cloud User Manual (https://support.wdc.com/product.aspx?ID=1101). The media server will only display supported media files.
And see the following WD Knowledgebase article that may be relevant.