[NaS]

There's a quite useful ingame NPC maker (or several even). Those are very useful to record NPCs ingame and also play them back. For actors playing animations you can use actors.

If you want to make an NPC just walk from A to B you can also use FCNPC and simply use FCNPC_GoTo(), or record that as well.

For video editing etc I think ~Error gave some good suggestions.