OPCAIOS Video Downloader

Design & videoFreeLevel: Easy

OPCAIOS Video Downloader

Download MP4 video or extract MP3 audio from YouTube, TikTok, Douyin, Facebook, Instagram, X and 1,000+ sites. Paste a link and download, no sign-up.

Official site How to use it

Overview

OPCAIOS Video Downloader is a video and audio download tool run by OPCAIOS at taivideo.opcaios.org. Paste a video link, choose Video (MP4) or Audio (MP3), pick the quality and download: the file is saved straight to your device.

It supports YouTube, TikTok, Douyin, Facebook, Instagram, X/Twitter, Bilibili, Threads, Vimeo, Pinterest, SoundCloud and more than 1,000 other websites. You can paste several links at once, or a YouTube playlist link to download in bulk.

It runs entirely in the browser: no software to install, no account, and it works on phones too. The interface is in Vietnamese.

Highlights

1,000+ websites

YouTube, TikTok, Douyin, Facebook, Instagram, X/Twitter, Bilibili, Threads, Vimeo, Pinterest, SoundCloud and many more.

MP4 video or MP3 audio

Switch the format button to download the video, or only extract the audio as an MP3 file.

Choose the quality

Each video lists the available resolutions so you can pick one before downloading.

Bulk and playlists

Paste several links separated by spaces, commas or new lines; a YouTube playlist link is split into individual videos.

No sign-in

Open the page and use it: no account, no installation, works on phones.

What it's for

Keep reference videos

Creators save sample videos from TikTok or Douyin to rewatch and study how they were edited.

Extract music or narration

Download the MP3 audio of a lecture or podcast to listen offline or feed it to a speech-to-text tool.

Prepare teaching material

Teachers and trainers download videos they have the right to use, to show them without an internet connection.

Archive your own videos

Shop owners download the videos they posted on Facebook or TikTok to keep an archive or repost on another channel.

How to use it

1
Copy the video link
Open the video in the app or browser, tap Share, then Copy link.
2
Paste it in the box
Go to taivideo.opcaios.org and paste the link into the large box. You can paste several links at once.
3
Choose the format
Pick Video (MP4) or Audio (MP3), then press the button to get the download link.
4
Pick the quality and download
When the video details appear, choose the resolution you want and press Download. The file saves to your device once it is processed.

Real-world example

Illustrative scenario

Example: a cosmetics shop owner wants to keep 5 product review videos they posted on TikTok. They copy the 5 links, paste them into the box together, choose Video (MP4) and request the download links. Five video cards appear, they press download all, and the files are saved to their computer one by one.

Tips & notes

Paste the original link
Use the video's direct share link, not a short link that goes through several redirect pages.
Long videos take longer
Long or high-quality videos need more processing time before the file is saved.
Respect copyright
Only download videos you have the right to use; do not repost other people's content without permission.
Retry on errors
Private, age-restricted or region-blocked videos cannot be downloaded; for other errors, try again after a few minutes.