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Substack MP4 Downloader - Easily Save MP4 Videos Online for Free

Quickly grab MP4 files from Substack *

* With Instag, saving MP4 files from Substack is quick, easy, and totally hassle-free.

Here's how to save MP4 files from Substack

Grabbing MP4 files from Substack with Instag is a breeze — just pop your link in above or add our URL before the content link:

instag.com/https://www.example.com/path/to/media
Save your Substack MP4 files in 3 easy steps
1. Grab your Substack video link

Find the MP4 content you want on Substack and copy its link.

2. Pop it in the box

Drop your Substack link right into the input box above.

3. Download and enjoy

Tap save and the MP4 file lands right on your device. That's it!

Build with the Instag API, Easily

Want to add saves to your own product? Our API does the heavy lifting — simply make a request and we send back the file. Quickly. Reliably.

Easy authentication
Friendly REST design
Quickly integrate in any language
Reliable uptime
Browse the Docs See Pricing
Python 
import requests

response = requests.post(
    "https://api.instag.com/api/download",
    headers={"Authorization": "API_KEY"},
    json={"url": "URL"},
)

for item in response.json()["items"]:
    print(item["type"], item["url"])

Your Questions Answered: Saving Substack Videos, Photos & Audio with Instag

Paste any Substack URL into the box above and press Download. Instag does not require you to sign in to Substack — public links work out of the box.

On the Substack MP4 videos endpoint Instag returns MP4 with H.264 video and AAC audio — the most compatible format. It plays on every phone, browser, smart TV, and console out of the box.

Substack MP4 videos typically caps at 1080p Full-HD. Instag pulls the same resolution the platform actually serves in its own player.

Instag treats Substack URLs the way the platform itself serves them — no transcoding, no quality re-encode, no metadata stripping unless the source already lacks it.

Most Substack downloads are people saving content for personal offline viewing. Instag does not charge per download, does not require an account, and does not log what you saved.

Substack is a social network where the same URL can resolve to a video, a photo, an album, or a profile. Instag inspects the URL pattern and routes to the right extractor.

There's no daily cap on Substack MP4 videos downloads. Paste each URL on its own line for a batch; failed URLs are skipped individually rather than aborting the whole batch.

Yes — Substack MP4 videos downloads from Instag are MP4 (H.264 + AAC). That format plays on every iPhone, Android phone, smart TV, and console without re-encoding.

Substack MP4 videos downloads through Instag are free regardless of clip length or resolution. Pro removes ads and adds batch downloads.

Saving Substack content for personal use is generally fine; redistributing copyrighted material without permission is not. Instag does not own or license Substack content — you are responsible for how you use what you download.

Instag does not retain Substack MP4 videos URLs, downloaded MP4s, or any account info. MP4 videos downloads stream through and are discarded — there is no per-user history.

Retry once — large Substack MP4 videos occasionally hit transient CDN errors. If it still fails, the source may be geo-restricted, age-gated, or marked subscribers-only by the uploader (Instag doesn't bypass any of those).

Supported sites

Instagram Facebook Twitter Tiktok
Reddit Bilibili Vimeo Soundcloud
Linkedin Pinterest
See all supported sites

Instag respects your privacy completely. No files are ever stored on our end — every download streams directly to your browser through a secure, real-time connection.

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