For specific modern formats (like HEVC/H.265), search the Microsoft Store for "HEVC Video Extensions." Note that some of these may cost a small fee (around $0.99). 3. Identify the Missing Codec
It will tell you the specific video format (e.g., HEVC, VP9, Xvid). Missing Codec Error While Playing Movie
when searching for codecs. Many "Free Codec Download" sites are fronts for malware. Only download well-known packs like K-Lite or software from official stores. For specific modern formats (like HEVC/H