What can I do to make these movie templates always stay inside the green list container, like the videos in a youtube playlist always stays inside a container in the right side?

Using Django Templates & Frontend
1

My website currently:-

image
image1920×1080 216 KB

Youtube’s playlist I’m talking about:-

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image697×985 193 KB

base.html:-

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>{% block page_title %}{% endblock page_title %}</title>
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet"
        integrity="sha384-9ndCyUaIbzAi2FUVXJi0CjmCapSmO7SnpJef0486qhLnuZ2cdeRhO02iuK6FUUVM" crossorigin="anonymous">
    {% block css_files %}{% endblock css_files %}
    <script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
</head>

<body>
    <nav class="navbar navbar-expand-lg bg-body-tertiary">
        <div class="container-fluid">
            <a class="navbar-brand" href="/">Watchlist</a>
            <button class="navbar-toggler" type="button" data-bs-toggle="collapse"
                data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false"
                aria-label="Toggle navigation">
                <span class="navbar-toggler-icon"></span>
            </button>
            <div class="collapse navbar-collapse" id="navbarSupportedContent">
                <ul class="navbar-nav me-auto mb-2 mb-lg-0">
                    <li class="nav-item">
                        <a class="nav-link" href="#">All Movies</a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link" href="#">Bookmarks</a>
                    </li>
                </ul>
                <form class="d-flex" role="search">
                    <input class="form-control me-2" type="search" placeholder="Search" aria-label="Search">
                    <button class="btn btn-outline-success" type="submit">Search</button>
                </form>
            </div>
        </div>
    </nav>

    {% block content %}{% endblock content %}

</body>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"
    integrity="sha384-geWF76RCwLtnZ8qwWowPQNguL3RmwHVBC9FhGdlKrxdiJJigb/j/68SIy3Te4Bkz"
    crossorigin="anonymous"></script>
{% block js_files %}{% endblock js_files %}
</html>

movie.html:-

{% load static %}

<div class="movie">
    <img src={{movie.cover_img.url}} alt="Movie Cover">
    <div class="movie-details">
        <h6 class="title">{{movie.title}}</h6>
        <button class="list-change-button" type="button"> > </button>
        <p class="release-year">Release Year: {{movie.release_year}}</p>
        <p class="duration">Duration: {{movie.duration_in_min}} min</p>
        <p class="imdb-rating">IMDb Rating: {{movie.imdb_rating}}</p>
        <p class="rotten-tomatoes-score">Tomatoes: {{movie.rotten_tomatoes_score}}%</p>
        <div class="tags">
            {% for tag in movie.tags.all %}
            <span class="tag">{{tag}}</span>
            {% endfor %}
        </div>
    </div>
</div>

index.html:-

{% extends 'movies/base.html' %}
{% load static %}

{% block page_title %}Watchlist{% endblock page_title %}

{% block css_files %}
<link rel="stylesheet" href={% static 'movies/style.css' %}>
{% endblock css_files %}

{% block content %}

<div id="main">

    <div class="container">
        <div id="search">
            <div>
                <div class="container-fluid mt-4 col-md-10">
                    <form class="d-flex" role="search">
                        <input class="form-control me-2" type="search" placeholder="Search" aria-label="Search">
                        <button class="btn btn-outline-success" type="submit">Search</button>
                    </form>
                </div>
            </div>
        </div>
    </div>



    <div>
        <div class="mt-5" id="list-container">
            <div class="list-item" id="currently-watching"><h3>Currently Watching</h3>
                <div class="movie-container">
                    {% for movie in movies_currently_watching %}
                    {% include 'movies/includes/movie.html' %}
                    {% endfor %}
                </div>
            </div>
            <div class="list-item" id="on-hold"><h3>On Hold</h3>
                <div class="movie-container">
                    {% for movie in movies_on_hold %}
                    {% include 'movies/includes/movie.html' %}
                    {% endfor %}
                </div>
            </div>
            <div class="list-item" id="plan-to-watch"><h3>Plan to Watch</h3>
                <div class="movie-container">
                    {% for movie in movies_plan_to_watch %}
                    {% include 'movies/includes/movie.html' %}
                    {% endfor %}
                </div>
            </div>
            <div class="list-item" id="completed"><h3>Completed</h3>
                <div class="movie-container">
                    {% for movie in movies_completed %}
                    {% include 'movies/includes/movie.html' %}
                    {% endfor %}
                </div>
            </div>
        </div>
    </div>
</div>
{% endblock content %}

views.py:-

from django.shortcuts import render
from django.http import HttpResponse, HttpResponseRedirect
from .models import Movie, Watchlist

# Create your views here.

def index(req):
    movies = Movie.objects.all()
    return render(req, "movies/index.html", {
        "movies_currently_watching": movies.filter(watchlist=Watchlist.objects.get(list_name="currently_watching")),
        "movies_on_hold": movies.filter(watchlist=Watchlist.objects.get(list_name="on_hold")),
        "movies_plan_to_watch": movies.filter(watchlist=Watchlist.objects.get(list_name="plan_to_watch")),
        "movies_completed": movies.filter(watchlist=Watchlist.objects.get(list_name="completed")),
    })