Q: File sharing solutions for LAN network? If I want to share my Films/Videos on LAN, what should I choose? My solution would be Samba.

Q: what else is there? ( NFS is very bad - security (?) + in many cases it could freeze the clients.. )

The main purpose is that it must be a "mountable" solution - so the clients can see a "folder" (the "folder" is actually the shared folder on a server - READ ONLY!). And they don't need to first copy the e.g.: AVI files to their PC because they could play them directly from the "folder".

A: Most of what you read about NFS security only applies to old versions of nfs and public networks. If your network is closed limited to trusted user usage you don't have to worry as much, and recent versions of nfs include all kinds of security measures. If you were really paranoid you could tunnel it over ssh.
All that to say the objection is surmountable and nothing else in your question gives us any clue how to answer it or what to recommend. Maybe if you described your situation a little better a technology could be forwarded.
