It's possible:
* The title is incorrect: Maybe you're thinking of a different title, similar to "Shadow Observers". Double-check the spelling and year.
* The film is obscure: It might be a very low-budget or independent film, making it difficult to find information online.
* You're remembering a different work: Perhaps you're thinking of a different movie, TV show, book, or game that features "shadow observers" or a similar concept.
Could you provide more context, like the genre, any specific details you remember, or a poster or screenshot? This might help me identify the work you're looking for.