scsea is a common abbreviation for South China Sea , which is the central setting for the movie's plot involving mythical aquatic creatures.
dual typically means "Dual Audio," allowing viewers to switch between the original Chinese audio and a secondary dubbed language (often Hindi or English). world4ufree-app-jiaoren-scsea-720p-hevcdual-mkv
720p indicates High Definition (HD) quality with a vertical resolution of 720 pixels. scsea is a common abbreviation for South China