How to Convert YouTube Videos into Offline Audio Tracks on iPhone for Free

📅 Created: 2025/04/28, Updated: 2025/04/28 ⏱️ Estimated reading time ~3 mins (524 words)

To play YouTube videos in the background or offline without a YouTube Premium subscription, using the open-source yt-dlp CLI tool enables downloading high-quality audio streams.
This article presents an end-to-end workflow: extracting audio via yt-dlp, saving to Google Drive, and enjoying seamless offline playback using the CloudBeats iOS music player.

Table of Contents

1. Introduction
1. 1.1. High-Level Workflow to Store Audio on iPhone
2. 1.2. Cost & App Comparison
2. Background Concepts
1. 2.1. What is yt-dlp ?
2. 2.2. What is CloudBeats?
3. Step-by-Step Implementation
Alternative: All-in-One iOS Execution via Pythonista3

1. Introduction

1.1. High-Level Workflow to Store Audio on iPhone

The overall architecture for extracting and listening to YouTube audio tracks on iOS is illustrated below:

Step ①: Extract Audio via yt-dlp CLI
- Execute a terminal command using yt-dlp to download only the high-bitrate audio stream from the target YouTube video.
Step ②: Upload Audio to Cloud Storage (Google Drive)
- Store the generated .m4a / .mp3 files in Google Drive or another supported cloud storage provider.
- CloudBeats natively integrates with:
  - Google Drive
  - Dropbox
  - OneDrive
  - Box
  - pCloud
  - MediaFire
  - NextCloud
  - My Cloud Home
  - WebDAV
Step ③: Stream & Download from Cloud Storage into CloudBeats
- Open the CloudBeats iOS app, connect your cloud account, and synchronize audio for offline playback.

1.2. Cost & App Comparison

Running Python and downloading files on your existing Mac or PC requires zero extra equipment cost. CloudBeats supports both iOS and Android.
A one-time purchase of CloudBeats Premium (~¥1,500 / one-off) unlocks playback speed adjustments and seamless offline caching.
Comparison of popular cloud music players:

Feature	CloudBeats Premium	Evermusic Pro	AudioRepeater
Pricing Model	¥1,500 (One-time)	¥1,500 / year	¥800 / 6 months
Playlist Management	Unlimited	Unlimited	Up to 4 (Free tier)
Offline Playback	⚪︎	⚪︎	⚪︎ (Free)
Folder Synchronization	⚪︎	⚪︎	×
Multi-Cloud Linking	⚪︎	⚪︎	×
Ad-Free	⚪︎	⚪︎	⚪︎
Playback Speed Control	⚪︎	⚪︎	⚪︎

In summary, with an investment ranging between ¥0 and ¥1,500 (one-time), you can build an automated, cloud-synced personal audio library on iOS without recurring subscriptions.

2. Background Concepts

2.1. What is `yt-dlp` ?

yt-dlp is a feature-rich, open-source command-line tool actively maintained as a modern fork of youtube-dl .
Install it quickly via Python’s package manager:

pip install yt-dlp

Ensure the binary is present in your shell PATH ( ~/.zshrc or ~/.bash_profile ):

pip show yt-dlp | egrep ^Location

# Example:
# Location: /Users/user01/.pyenv/versions/3.12.1/lib/python3.12/site-packages

Why not legacy youtube-dl ? Development on the original repository halted around 2020/2021; running it against current YouTube web endpoints results in signature decryption errors ( decodeURIComponent failures):

% youtube-dl "https://www.youtube.com/watch?v=lVfIDu1GqzI"
ERROR: Signature extraction failed: Could not find JS function 'decodeURIComponent'

yt-dlp resolves these cipher updates dynamically and is the recommended industry standard tool.

2.2. What is CloudBeats?

CloudBeats is a cloud music player that streams audio files directly from services like Google Drive and Dropbox without occupying local device storage.
Upgrading to Premium unlocks local offline downloading, folder sync, and variable playback speeds.

3. Step-by-Step Implementation

Step 3.1: Download Audio Stream with `yt-dlp`

Copy your target video URL from the YouTube browser address bar.
In your terminal, navigate to your download directory and execute the following one-liner:

cd ~/Downloads

# Download highest quality standalone audio stream
yt-dlp -f wa "https://www.youtube.com/watch?v=lVfIDu1GqzI"

Step 3.2: Upload Files to Cloud Storage (Google Drive)

Upload the extracted audio files to a designated folder in Google Drive (e.g., Music/YouTube ).
Keeping an organized folder hierarchy simplifies automatic multi-track synchronization inside mobile players.

Step 3.3: Sync and Listen in CloudBeats

Open CloudBeats on your iPhone. Tap the hamburger menu in the top right and tap Settings .

Select Google Drive and authorize your account.

Once connected, open your Google Drive storage from the sidebar.

Tap the ··· icon next to the folder and select Download to cache tracks for offline playback.

Completed tracks display a download badge ( ⬇︎ ), ready for offline playback anytime.

Alternative: All-in-One iOS Execution via Pythonista3

For users who prefer a standalone on-device workflow without touching a PC, running Pythonista3 alongside Apple Shortcuts allows executing yt-dlp scripts directly on iOS.
- Reference: One-Tap YouTube Audio Downloader with Pythonista3 and Shortcuts
However, because Pythonista3 requires additional purchases and intricate sandboxed runtime setups, the PC-to-CloudDrive approach detailed above remains the most stable and straightforward approach.