In this tutorial, we will show you how to create an infinite zoom loop through the screen of your smartphone using Adobe Premiere Pro. Follow these steps to achieve this mesmerizing visual effect.

**Step 1: Prepare Your Footage**

1. Drag your footage into a new sequence in Adobe Premiere Pro.
2. Select a still frame in your video where you will place the video within a video.

**Step 2: Apply the Ultra Key Effect**

1. Go to **Effects** and search for **Ultra Key**.
2. Apply the **Ultra Key** effect to your footage to key out the screen of your smartphone.
3. Use the **Eyedropper Tool** to select the color you want to key out.

**Step 3: Layer and Duplicate Your Footage**

1. Duplicate your footage layer by selecting it and pressing **Ctrl + C** (Windows) or **Cmd + C** (Mac) and then **Ctrl + V** (Windows) or **Cmd + V** (Mac) to paste it.
2. Position the duplicated layer so it fits within the screen of the original footage. Adjust the scale and rotation if necessary.
3. Repeat this process several times to create the infinite zoom effect. Each new layer should appear within the screen of the previous layer.

**Step 4: Optimize Your Screen**

1. To avoid blurring as you zoom in, adjust the **Scale** and **Position** of each layer to ensure the screen remains sharp.
2. Use the **Transform** effect to control the scale and position more precisely.

**Step 5: Track Your Screen**

1. Use the **Track Motion** feature to track the movement of your screen if your footage is not entirely still.
2. Apply the tracking data to the duplicated layers to ensure they follow the movement of the screen.

**Step 6: Loop Your Footage and Zoom In**

1. Loop your footage by duplicating the sequence and placing it at the end of the original sequence.
2. Use keyframes to animate the **Scale** and **Position** of the nested sequence, creating a continuous zoom-in effect.

**Step 7: Add Reflections and Final Touches**

1. Add reflections to enhance the realism of the effect. You can use a **Gaussian Blur**