YouTube is the best platform to watch video and audio online. But you can only see the video and audio because YouTube does not support video converter and downloading.YouTube is a safe & secure application.If you want to download and convert videos you can visit Tubidy and  Y2mate.

List of video and music converter and downloading tool

Tubidy 

Tubidy is the best audio and music converter tool.It provides users with free access and high speed downloads and downloads music in mp3 and video in mp4.Tubidy provides various audio and visual content  navigation on the web through the official website.Tubidy provides a library in which user save your favorite songs.

Advantage 

• It supports converting video to many formats like MP4, M4V, MP3, FLV, 3GP, WEBM, WMV and more. 
• It downloads videos in different quality like 144p,240p,360p,480p,720p,1080p (HD),
• You can easily download and convert YouTube videos without registration.

Also check other websites like

Y2mate 

YTMp3 music converter

Ytmp3 supports downloading and converting music. Mp3 is supported on Android, Tablet, Desktop and many more devices.That is free music downloading and convert tool and 

That is safe and secure. In the mp3 converter you can easily add file name, author name, artist name, album title, and genre information.

Advantage

• High-quality video converter.
• mp3 requires less memory.
• It downloads and converts music  in different quality like 64kbps, 128kbps,192kbps, 256 kbps and 320 kbps many more.
• User-friendly interface.

YTMp4 video Downloader  

Ytmp4 is a video downloader tool.That is a faster YouTube video downloader and converter tool. It supports many browsers like  Google Chrome, Safari, Mozilla Firefox, Edge, and Opera and many more.No need to register in this tool. 

Advantage

• You can download unlimited YouTube video downloads and converters.
• There is no malware or virus on that website .
• User data is safe and secure on this tool.
• No need to install any software.