Currently exported cameras exports as part of mesh, but gltf supports the native cameras in the file https://github.com/KhronosGroup/glTF-Tutorials/blob/master/gltfTutorial/gltfTutorial_002_BasicGltfStructure.md
For me it’s needed to fix model in the Blender from some positions of camers. But now it’s impposible when cameras is just part of mesh.
And it will useful to save image path (or name) in the camera titles.