It is a good idea to read the lists of contracts that are used in professional productions. Some them can help and protect you even in amateur filmmaking. So you know what to sign or get somebody else to sign when the situation arises. Just reading the list is a free course in an extensive lists of entertainment contracts.
Film and Video
These contracts are particular to film and video https://www.gigslist.info/film
Producer
These contracts are for producers of online events. Anything published in video or film is classed the same as TV or Film https://www.gigslist.info/act-write-direct-produce.
Employment
If you are hiring or casting, even if it is a no pay gig, contracts keep things clear https://www.gigslist.info/employment-contracts
The Whole List
https://www.gigslist.info/entertainment-contracts
Learn and be safe.
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