The post asks if it is possible to edit the metadata of each chunk. The community members in the comments confirm that this is possible, using the syntax node.metadata["key"] = "val" to update the metadata of a node. They also suggest that updating a node that is already in the index may be more challenging. The community members indicate that this approach can be used to add information like the page URL or video URL to the metadata. However, there is no explicitly marked answer on whether this can be done at the llamacloud level.