A little confusion on javaScript (array) map and forEach method


Why does they both not produce the same output, more specifically I’m scratching my head around why does forEach outputs undefined.

movieLists.forEach(list=>{
    return list.videos(0).id;    
});
// Outputs: undefined
movieLists.map(list=>{
    return list.videos(0).id;
});
// Outputs:(70111470, 65432445)

here is my array

var movieLists = (
            {
                name: "New Releases",
                videos: (
                    {
                        "id": 70111470,
                        "title": "Die Hard",
                        "boxart": "http://cdn-0.nflximg.com/images/2891/DieHard.jpg",
                        "uri": "http://api.netflix.com/catalog/titles/movies/70111470",
                        "rating": 4.0,
                        "bookmark": ()
                    },
                    {
                        "id": 654356453,
                        "title": "Bad Boys",
                        "boxart": "http://cdn-0.nflximg.com/images/2891/BadBoys.jpg",
                        "uri": "http://api.netflix.com/catalog/titles/movies/70111470",
                        "rating": 5.0,
                        "bookmark": ({ id: 432534, time: 65876586 })
                    }
                )
            },
            {
                name: "Dramas",
                videos: (
                    {
                        "id": 65432445,
                        "title": "The Chamber",
                        "boxart": "http://cdn-0.nflximg.com/images/2891/TheChamber.jpg",
                        "uri": "http://api.netflix.com/catalog/titles/movies/70111470",
                        "rating": 4.0,
                        "bookmark": ()
                    },
                    {
                        "id": 675465,
                        "title": "Fracture",
                        "boxart": "http://cdn-0.nflximg.com/images/2891/Fracture.jpg",
                        "uri": "http://api.netflix.com/catalog/titles/movies/70111470",
                        "rating": 5.0,
                        "bookmark": ({ id: 432534, time: 65876586 })
                    }
                )
            }
        );