HTML & CSS Text and image over a video background

[effy]

Hello, I'm new to html and css and i'm learning through youtube tutorials.
I want to create a website but I'm stuck...
My first page contains 1 video that I use as a background and I want to put a text, a logo (img) and a menu over it, and then 3 images that appear when you scroll down.
When I dont put my three images, i have no problem to display my text and logo over my video-background but then, when I add them the text doesn't appear anymore and can't change the logo size...
I tried different tutorials to find a way to add my text over it but it still doesn't work, can someone help me ?

Here's a part of the HTML:

  <div class="container">
            <div class="section">
                <div class="content">
                    <video src="video-introduction.mp4" muted loop autoplay></video>
                </div>
                <div class="overlay"></div>
                <div class="logo">
                    <img src="logo.PNG" alt="Logo">
                </div>
                <p>Web site title</p>
                <a href="#"> Nous contacter </a>
            </div>

            <div class="section">
                <div class="content">
                </div>
            </div>

and CSS:

.container
{
      position: relative;
      width: 100%;
      height: 100vh;
      overflow: auto;
}
.container .section
{
      position: relative;
      width: 100%;
      right: 0;
      min-height: 100vh;
      justify-content: space-between;
      align-items: center;
      text-align: center;
}
.container .section .content video
{
    position: relative;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    object-fit: cover;
    z-index: 1;
}
.container .section .content
{
    position: absolute;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
}
.logo img
{
    width: 10px;
    line-height: 5em;
    height: 39vh;
    justify-content: center;
    align-items: center;
    margin-top: 23vh;
}
.container .section .content p
{
    font-size: 1.3em;
    color: #fff;
    padding: 2px 30px;
    text-decoration: none;
    margin-top: 1vh;
}
.container .section:nth-child(2)
{
  background: url(macjauneentier.png);
  background-size: cover;
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-position: 100% 50%;
}

Thank you (sorry I'm a beginner)