Because .rmvb is a legacy format, modern default media players (like Windows Media Player) may not support it without additional codecs. Recommended players include:
A strong candidate for this file is the 2006 TV series Ode to the Seven Swords (IMDb) , where "Qinggan" (often shortened to "QingG" in file-sharing circles) is one of the titular swords.
A standard definition (SD) episode in RMVB format usually ranges between 150 MB and 400 MB . If the file is significantly smaller (e.g., under 10 MB) or is an .exe file, it is likely a virus.