

the purpose of the partially locked portion is To share with others selectively and To let everyone to quickly preview the contents The reason I mentioned the cloud is not necessarily get the support of the cloud system, I store the files on the cloud. so ideally viewer runs the file on his/her computer via link with a video player to be able to see the preview whereas another person viewing the same file in full via some sort of password, I don’t care if a decrypted file is kept in the authorized guest computer or deleted
Thank you, that is the ideal solution I appreciate very much I’m afraid I cannot create my own player or format with my limited knowledge I’m kind of searching a kind of player + a small hack to achieve such goal