dual typically means "Dual Audio," allowing viewers to switch between the original Chinese audio and a secondary dubbed language (often Hindi or English).
hevc (High Efficiency Video Coding/H.265) is a compression standard that provides high video quality at a significantly smaller file size than older standards.
world4ufree-app indicates the file originated from or was indexed by a specific media distribution platform known for providing direct download links.
720p indicates High Definition (HD) quality with a vertical resolution of 720 pixels.
scsea is a common abbreviation for South China Sea , which is the central setting for the movie's plot involving mythical aquatic creatures.