How to Set a Thumbnail on a Facebook Video on Mobile

A great thumbnail can be the difference between someone scrolling past your Facebook video and someone stopping to watch. It’s your video’s CEO of First Impressions, and getting it right is a huge part of a successful content strategy. This guide breaks down exactly how to set a custom thumbnail on your Facebook videos directly from your mobile device, covering the best methods for Pages, Reels, and already-published content.

Why Your Facebook Video Thumbnail Matters More Than You Think

Think of your thumbnail as the cover of a book or the poster for a movie. It’s a tiny piece of visual real estate that has to do a massive amount of work. In the blink of an eye, it needs to grab attention, communicate the video's topic, and convince a potential viewer that your content is worth their time. A blurry, dark, or random frame from your video won’t cut it in a fast-moving feed.

A well-designed thumbnail accomplishes a few key things:

• It Stops the Scroll: Bright colors, clear faces, and intriguing text overlays can physically stop a user’s thumb from swiping past.
• It Sets Expectations: The thumbnail tells the viewer what the video is about before they even press play, reducing the chance they'll click away after a few seconds because it wasn't what they expected.
• It Creates a Professional Look: Consistent, high-quality thumbnails make your Facebook Page look polished and professional, signaling to your audience that you create valuable content.

Ignoring your thumbnail is like spending hours cooking a gourmet meal and then serving it on a paper plate. It undermines all the hard work you put into creating the video itself.

The Official Method: Using the Meta Business Suite App

While the standard Facebook app is great for casual browsing, it offers limited and often inconsistent control over video thumbnails for Pages. For professionals, content creators, and business owners, the Meta Business Suite app is the go-to tool. It's free, reliable, and gives you the options you actually need. This is the best way to set a video thumbnail from your phone.

Here’s the step-by-step process:

1. Download and Log In: If you don't already have it, download the Meta Business Suite app from the App Store or Google Play Store. Log in with the Facebook account connected to your Page.
2. Start a New Post: On the main screen, tap the blue “Create post” button at the bottom center of the screen.
3. Select Your Video: Choose "Photo/video" from the list of options, grant access to your photos if prompted, and select the video file you want to upload from your camera roll. Tap "Done."
4. Find the Thumbnail Options: After your video loads in the post composer, you'll see a preview of it. You may see a button that says "Choose thumbnail" or you might need to tap the small "Edit" button overlaid on the video preview itself. This will open up the video editing tools.
5. Choose or Upload Your Thumbnail: Here, you’ll typically have two powerful options:

How to Choose the Perfect Frame From Your Video

Inside the thumbnail settings, you'll see an option labeled "Choose frame" or something similar. This brings up a filmstrip of your entire video. You can drag the slider left and right to scrub through every frame of your video to find the perfect moment. Look for a shot that is:

• Clear and In-Focus: Avoid blurry frames where there's a lot of motion.
• Expressive: If you're on camera, find a frame with a dynamic facial expression - one that conveys curiosity, excitement, or surprise.
• Contextual: Choose a shot that gives a strong hint about the video's subject matter.

Once you’ve found the best frame, tap “Save” or “Done.”

How to Upload a Custom Image as Your Thumbnail

This is where you get the most creative control. Instead of picking a frame, select the option to "Upload image." This lets you choose any photo from your phone's camera roll to serve as the thumbnail. This is ideal for thumbnails you’ve custom-designed with text overlays, logos, or other graphics.

Tips for a Custom Thumbnail:

• Correct Dimensions: For the best results, use an image with a 16:9 aspect ratio, like 1920x1080 pixels. This prevents weird cropping or black bars.
• Keep Text Minimal: Add a few powerful, easy-to-read words that create intrigue.
• Export a High-Quality File: Make sure the image you upload isn't compressed or pixelated.

After selecting your custom image, tap "Save" to confirm your choice. Finally, write your caption, add your hashtags, and either publish the video immediately or schedule it for later.

Editing a Thumbnail on an Already Published Video

Made a mistake or thought of a better thumbnail after posting? No problem. The Meta Business Suite app also makes it easy to change the thumbnail on a video that’s already live on your Page.

1. Find Your Content: Open the Meta Business Suite app and tap on the "Content" tab at the bottom of the screen.
2. Select the Video: Scroll through your published posts to find the video you want to edit. Tap on it.
3. Open the Editor: Tap the three-dot menu (...) in the bottom-right corner of the post and select "Edit post."
4. Change the Thumbnail: Just like with a new upload, tap the "Edit" button on the video preview. This will bring you back to the screen with the thumbnail options. You can now select a new frame or upload a different custom image.
5. Save Your Changes: After choosing your new thumbnail, hit "Save," and then save the post edits. Facebook will update the video with your new thumbnail.

What About Facebook Reels and Stories?

Reels and Stories function a bit differently from regular feed videos, and their "thumbnail" options reflect that.

Choosing a Cover for Facebook Reels

For Reels, the thumbnail is called a "Cover." You can - and absolutely should - set this *before* publishing.

1. Create your Reel with clips, music, and effects.
2. On the final screen before sharing, where you write your caption, you will see an "Edit cover" option on the preview of the Reel. Tap it.
3. You’ll be given the same two choices: drag a slider to choose a frame from the video, or tap "Add from camera roll" to upload a completely custom-designed cover image.
4. Save your choice and publish your Reel. Changing the cover after publishing is not always possible on mobile, so it's a hundred times easier to get it right the first time.

Getting Creative with Stories

Facebook Stories don’t have fixed thumbnails. They are designed to be ephemeral and in-the-moment. The "preview" is simply the first frame or two of the video. Because of this, your job is to make the first 1-2 seconds of your Story video as captivating as possible. Start with a bold visual, a quick question in a large font, or an immediate action to hook viewers before they tap to the next Story.

Best Practices for a Thumbnail That Gets Clicks

Knowing how to set a thumbnail is only half the battle. Here are a few quick tips to help you design one that actually performs.

• Be Bright and Bold: Use high-contrast colors that stand out in a crowded feed. Dark or muted images tend to get lost.
• Show a Human Face: Our brains are wired to notice faces. A clear, expressive shot of a person looking toward the camera (or at an object of interest) is almost always a winner.
• Add a Strong Text Headline: Use 3-5 powerful words that communicate the video's main benefit or spark curiosity. Use a thick, sans-serif font that’s easy to read on a tiny screen.
• Stay On-Brand: Use a consistent style, font, and color palette across your thumbnails so your followers can recognize your content instantly.
• Generate Curiosity (Don’t Give it All Away): Show a before-and-after, an emotional reaction, or a problem, but don’t reveal the entire solution. Make people click to find out what happens.

Final Thoughts

Mastering video thumbnails on mobile mostly comes down to using the right tool for the job. While the main Facebook app can feel limiting, the Meta Business Suite app provides the professional control you need to ensure your videos always make an amazing first impression. By choosing a compelling frame or uploading a custom-designed image, you give your content the best possible chance to stop the scroll and capture attention.

At Postbase, we built our platform knowing that managing small but important details like thumbnails across every video platform can become overwhelming. Juggling separate apps, inconsistent features, and quirky workflows is exactly the type of friction we wanted to solve for creators and marketers. When you're ready to publish video content on Facebook, Instagram Reels, TikTok, and YouTube Shorts, our tool helps streamline the entire process. With Postbase, you can manage everything from a single visual calendar, ensuring your videos look fantastic everywhere without the usual headache.