Stop Getting Rejected: The Platform-by-Platform Video Format Cheat Sheet Every Creator Needs

You've put in the work. The edit is tight, the lighting looks great, and you're finally ready to share your video with the world. Then the upload bar freezes. Or the platform spits out a cryptic error message. Or — maybe the worst outcome — the video uploads just fine but looks like it was filmed through a screen door.

This happens to creators at every level, from first-time hobbyists to seasoned YouTubers managing entire channels. The culprit is almost always the same thing: a mismatch between your video file and what the platform actually wants. Let's fix that.

Why Platforms Reject Videos in the First Place

Social media platforms aren't being difficult for the fun of it. Each one has built its infrastructure around specific technical standards that keep their systems running efficiently and their users' feeds loading fast. When your file doesn't match those standards, the platform either has to do a ton of extra processing work — or it just says no.

The three most common rejection triggers are:

• Wrong codec: The codec is the method used to compress and decompress your video data. H.264 is the most universally accepted codec across platforms, but plenty of editing software exports in formats that aren't as welcome.
• Incorrect aspect ratio or resolution: A square video might look great on Instagram but get letterboxed or cropped awkwardly on YouTube.
• File size or bitrate limits: Every platform caps how large a file can be, and some also cap the bitrate — the amount of data processed per second of video.

Understanding these three categories will take you most of the way toward upload-proof content.

YouTube: The Most Forgiving — But Still Picky

YouTube accepts a wider range of formats than most platforms, but that doesn't mean anything goes. The recommended specs are pretty specific if you want your video to look its best.

Recommended format: MP4
Recommended codec: H.264 video, AAC audio
Resolution options: 1080p (1920×1080) for standard HD; 4K (3840×2160) if you're shooting high-end content
Aspect ratio: 16:9 is the standard; YouTube will add black bars for other ratios
Max file size: 256 GB or 12 hours, whichever comes first

Where creators run into trouble on YouTube is usually with MOV files exported directly from Final Cut Pro or with older AVI files. These can upload fine, but YouTube will transcode them on its end, sometimes introducing compression artifacts or color shifts. Converting to H.264 MP4 before uploading gives you more control over the final result.

TikTok: Vertical Is King, and Compression Is Brutal

TikTok has some of the most aggressive compression of any major platform. If you upload a video that's already been heavily compressed, you're going to end up with a muddy mess by the time TikTok's servers are done with it.

Recommended format: MP4 or MOV
Recommended codec: H.264
Resolution: 1080×1920 (vertical, 9:16 aspect ratio)
Frame rate: 30fps minimum; 60fps preferred
Max file size: 287.6 MB for iOS, 72 MB for Android (when uploading in-app)

The key move with TikTok is to export at the highest quality your editing software allows before uploading. Give TikTok's compression algorithm something good to work with. Also worth noting: TikTok has been inconsistent about accepting certain audio codecs, so AAC audio is the safest bet.

Instagram: Three Formats, Three Sets of Rules

Instagram complicates things by treating Reels, feed posts, and Stories as almost entirely separate products — each with its own requirements.

Feed Videos:

• Format: MP4
• Aspect ratio: 1:1 (square) or 4:5 (portrait) for best real estate in the feed
• Max length: 60 seconds
• Max file size: 100 MB

Reels:

• Format: MP4 or MOV
• Aspect ratio: 9:16 (full vertical)
• Resolution: 1080×1920
• Max length: 90 seconds

Stories:

• Same vertical specs as Reels
• Max length: 15 seconds per clip

One of the most common Instagram upload failures involves horizontal videos being submitted for Reels. The platform doesn't automatically rotate or crop — it just rejects the file or displays it in a way that looks unintentional. If you're repurposing YouTube content for Instagram, conversion with a crop and resize step is non-negotiable.

Facebook: The Wild Card

Facebook is arguably the most technically tolerant of the major platforms, but it also has the most varied use cases — personal profiles, business pages, Facebook Watch, Reels, and Stories all live under the same roof.

Recommended format: MP4
Recommended codec: H.264
Resolution: 1080p maximum for standard uploads
Max file size: 10 GB
Max length: 240 minutes

Facebook's main quirk is that it tends to reduce quality on videos with very high bitrates, even if the file itself meets all other requirements. Keeping your video bitrate between 4 Mbps and 8 Mbps for 1080p content tends to produce the most consistent results.

How to Convert Your Videos Before You Upload

The smart workflow is simple: convert first, upload second. Don't rely on the platform to handle your file — take control of the output yourself.

A good video converter lets you select your target platform, choose your codec, set your resolution and aspect ratio, and export a clean file that meets every spec before you ever open the upload window. This is especially useful when you're distributing the same content across multiple platforms, since each one needs a slightly different version.

Here's a quick pre-upload checklist:

1. Identify the target platform and look up its current specs (platforms do update these)
2. Export your video from your editing software at the highest quality possible
3. Run the file through a converter to match the platform's preferred codec, resolution, and aspect ratio
4. Check the file size before uploading — resize if needed
5. Upload and preview before publishing

Don't Let the Platform Decide How Your Video Looks

Every time you hand a non-compliant video to a social platform, you're letting their algorithm make decisions about your content. Sometimes it works out fine. Often it doesn't. The creators who consistently have sharp, well-performing videos aren't just better editors — they're more deliberate about their technical workflow.

Converting your videos to match platform specs is one of the lowest-effort, highest-impact things you can do for your content quality. Do it once, build it into your routine, and you'll never have to troubleshoot a failed upload again.