Watched the whole thing. Because he's an adorable, precious little baby bird... Pretty sure mommy and daddy were first timers. With only one viable egg, and being very unsure what to feed it. Nonetheless they were great parents!!! Never gave up. Not on him, or they're eggs!
Oh no poor baby😥 I am also wondering why the other eggs hasn't hatched. I would take this poor chick in and make sure it survives if the molther isn't coming back.