Files named with the format "QQ视频_..." indicate a video recorded or shared via Tencent QQ, with the long string serving as a unique hash identifier for the file. These files, often found in Tencent/MobileQQ directories, are commonly associated with, but not limited to, potential digital threats such as sextortion, scams, or malware distribution. Security experts advise against opening suspicious files and recommend scanning them with anti-virus software. QQ视频无法打开摄像头 - Microsoft Learn