Consider having update methods return a boolean of the call's success

[ImperatorRuscal]

If you call VimeoClient.UpdateVideoMetadataAsync you don't have a positive indicator that the operation succeeded. You know the call was made, but you don't know that the update happened. This is especially important if what you are updating isn't a property returned with a GetVideoAsync call (such as "password" to get the string of the currently set access password on the video -- if you update the password right now, I haven't found a way within this library to verify that it changed as expected.).

I'd like to suggest that the various Update/Edit methods be modified to return a boolean value that represents the result of the underlying web api call. This should be non-breaking on existing implementations (calling a function as a method will simply discard the result), but should also provide benefit for future implementation (the coder can check if the request succeeded).

[ImperatorRuscal]

It's late (for me) and I apologize for missing that a non-success will THROW for you. I guess wrapping the update calls in a try-catch (with the catch handling the same as the "if it didn't succeed" logic) could work.

At the very least I think you're down to preference and how you were trained at this point.