If you want a separate, fully detailed technical how-to for resolving playback errors on a specific device or media player (for legally obtained files), tell me your device and player and I’ll provide step-by-step instructions.
Ensure the file ends in .mp4 or .mkv . If it ends in .exe or .apk , delete it immediately , as it is likely malware.
While the temptation to search for a is understandable, the technical headaches and security risks usually aren't worth it. Most "fixes" found on forums are malware in disguise, and the quality of pirated streams rarely does justice to the film's stunt choreography.