Below is a list of Applications for Android, Windows and iOS that allows users to download online videos from youtube directly to your PC or Mobile device. Each app has its own features but all are made for one purpose, download and save online videos in Audio and video files or audio only MP3 Files

Use NewPipe to streamline the downloading experience! You can search for videos within the app. Once found, you can download them. The application is an open-source but no user data is saved or sent to web.

GetTube is a simple app to download videos from YouTube.This app also gives you the possibility to extract only the audio, letting you create your own music library via YouTube videos. The interface in GetTube is very convenient and simple. Multiple videos can be downloaded at the same time at such good speed.

TubeMate is a very popular Android app for downloading YouTube video. It has an elegant interface which is easy to use, and you can download videos from multiple video sharing sites. You can use it to download video directly as MP3 file.

Youtube Downloader Online gives users the ability to download YouTube videos to users Android phone gallery or SD card.

Free, Fast and Private, Instube is surely one of the cleanest, light-weight and user-friendly Android App. It is optimized to provide the highest download speeds and do support HD, Full HD or 4K resolutions.

VidMate gives users free access to downloading videos from YouTube of the highest quality. The downloaded videos are classified by coming soon, new releases, top rated and popular.

Videoder is one of the top YouTube downloaders for Android, it is free, secure, lightweight and fast YouTube video downloader for Android.
You can download multiple video files at a time with different resolutions. You can also convert the video file into mp3 format directly.

KeepVid is an all-in-one video solution platform, including online video converter, online video editor, online video compressor, online audio converter. No additional software installation is required to download the videos. Users can download files like MP3, MP4, and other formats form any of the streaming sites.

MP4 Converter
MP4 Converter is a superb YouTube Downloader tool. It can also download videos from other popular sites like Instagram, Vimeo, etc. The application is reliable and delivers fast downloading speed and comes in online and offline version.

YouTube for Android TV
If you need to download these videos offline, You can use YouTube Downloader for Android to download videos in just a few taps. The app lets you organize your downloads, while selecting whichever quality you want.

YouTube Downloader
This video downloader can download YouTube videos with faster speed compared to other video downloaders and also enables users to download videos from other other video sharing sites.

Yout is your everyday companion, even when you have limited data or a slow connection. YouTube Go also lets you share videos without internet with other users in high quality.

Convert2MP3 allows you to convert Youtube videos to MP3 easily. The conversions can be made in all popular audio and video formats with superb user experience.

YTD Video Downloader for Android
For those who are addicted to YouTube, being able to download YouTube videos is hugely valuable. This app has been built to download YouTube videos with a user-interface that is well-designed and easy to operate. You can Preview the video before download and it supports MP3 and MP4 formats.

arkTube is an app that lets you download videos from the official YouTube app. It supports downloading all resolutions including 1080p,1440p,4k,8k.It has a feature to automatically merge thumbnails, tags, and other metadata when downloading the Audio.

ShowBox app is available to download on Android, iOS (iPhone, iPad) and PC for free. Install ShowBox online movie review app using the step-by-step guide

YouTube Go
YouTube Go is your everyday companion, even when you have limited data or a slow connection. YouTube Go also lets you share videos without internet with other users in high quality.

All these Android apps enable you to download YouTube videos to your phone memory or SD card. Try any of them and watch videos offline on your Android phone or Tablet.