Browser Extension
1. Youtube Video & Audio Dowloader Extension
Use the distillvideo video extension to download videos&Audios directly from YouTube, this extension will add a "Download Video" button on your youtube playing page.
Instructions
Step 1: Install the Tampermonkey extension for your browser. TamperMonkey is needed for our extension to work properly. To install, click on the link below that corresponds to your browser:

Step 2: Once TamperMonkey is installed successfully, click here to the installing page. To add the "DistillVideo extension" to your browser, on the page click "Install" as showed in the following image. The userscript can also be installed from Greasyfork and Openuserjs.

Step 3: Now whenever you are watching a video on YouTube, a "Download Video" button will appear as shown in the screenshot. Click on it to download the video.

2. Youtube Caption/Subtitle Dowloader Extension
Use this extension to download subtitles directly from YouTube, this extension will add a download button on your youtube playing page.
Instructions
Step 1: Install the Tampermonkey extension for your browser as described above.
Step 2: Once TamperMonkey is installed successfully, click here to install the "DistillVideo-Subtitle Downloader" script to your browser. The userscript can also be installed from Greasyfork and Openuserjs.

Step 3: Now whenever you are watching a video on YouTube, a "Download Subtitles" button will appear as shown in the screenshot. Click on it to download the subtitles. Both Closed Captions (CC) and Auto-generated captions are supported.

3. Youtube MP3 Converter
Use this extension to convert YouTube video to MP3 directly, this extension will add a download button on your youtube playing page.
Instructions
Step 1: Install the Tampermonkey extension for your browser as described above.
Step 2: Once TamperMonkey is installed successfully, click here to install the "Youtube MP3 Converter" script to your browser. The userscript can also be installed from Greasyfork and Openuserjs.
Step 3: Now whenever you are watching a video on YouTube, a "Convert To MP3" button will appear as shown in the screenshot. Click on it to convert to MP3. It will convert the video into mp3 with the best quality. The bitrate will be calculated precisely, which ranges from 128kbps to 320kbps depending on original file.
