What are some newborn baby’s hunger cues i should lookout for?

I found this video on youtube! It pretty much echoes what has been said earlier but I think having a video like this can help new mommys identify the hunger cues especially if they are more visual people. From the comments made about the video, alot of moms seem to appreciate having a real demonstration of how babies look like when they are hungry.The cute baby footage are an added bonus!