Summarize the following:
It won't outright block ads that play on YouTube videos; however, it will automatically detect an ad and mute your Android's volume as a response, and when the "Skip Ad" button appears on the ad, AdSkip will select the button and unmute your Android's audio. You can enable app downloads from unknown sources by doing the following:  Open Settings  Scroll down and tap Security  Check the "Unknown sources" box or slide the "Unknown sources" switch to the right. This is your Android's default web browser. You can also use another web browser (e.g., Firefox) if you'd prefer. Tap the address bar at the top of the browser screen, then type in https://www.xda-developers.com/xda-labs/ and tap ↵ Enter. It's a yellow button near the bottom of the screen. You may have to scroll down to see this. Doing so will prompt the XDA app file to begin downloading onto your Android. You'll see this appear at the top of the screen once the file finishes downloading. Tapping it takes you to the app file. It should be in the bottom-right corner of the screen. This will prompt the XDA Labs app to install onto your Android. You can also open your file manager app, tap Downloads, and tap the XDA file to get to this screen. You'll find the XDA Labs app icon, which resembles the letters "xda" on a bag, in the App Drawer. It's near the top of the screen. Tap the magnifying glass icon {"smallUrl":"https:\/\/www.wikihow.com\/images\/e\/ea\/Macspotlight.png","bigUrl":"\/images\/thumb\/e\/ea\/Macspotlight.png\/30px-Macspotlight.png","smallWidth":460,"smallHeight":460,"bigWidth":"30","bigHeight":"30","licensing":"<div class=\"mw-parser-output\"><p>I edited this screenshot of a Mac icon.\n<\/p><p>License: <a rel=\"nofollow\" class=\"external text\" href=\"http:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a><br>\n<\/p><\/div>"} and type in cygery adskip, then tap ↵ Enter on your Android's keypad. It should be the first result on the page. The AdSkip page will open. It's a downward-facing arrow icon in the upper-right side of the page. This is in the bottom-right corner of the screen. Doing so will prompt Cygery AdSkip to begin installing onto your Android. Once it finishes, you'll be able to find it in the App Drawer. Tap the Cygery AdSkip app icon to do so. This will take you to your Android's Accessibility menu. It's near the bottom of the page. It's at the top of the screen. Once tapped, the switch will change color {"smallUrl":"https:\/\/www.wikihow.com\/images\/2\/28\/Android7switchon.png","bigUrl":"\/images\/thumb\/2\/28\/Android7switchon.png\/35px-Android7switchon.png","smallWidth":460,"smallHeight":394,"bigWidth":"35","bigHeight":"30","licensing":"<div class=\"mw-parser-output\"><p>I edited this screenshot of an Android icon.\n<\/p><p>License: <a rel=\"nofollow\" class=\"external text\" href=\"http:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a><br>\n<\/p><\/div>"} which signifies that the service is active. AdSkip will open to the main menu. Tap the white switch next to each of the following:   Enabled - Ensures that AdSkip is active.  Mute audio during ad - Ensures that AdSkip will mute ads while they play. It will continue running in the background via the Accessibility settings. You can now watch YouTube videos without having to listen to or skip ads.

Summary:
Understand Cygery AdSkip's limitations. Make sure that your Android can download non-Google Play apps. Open  Chrome. Go to the XDA Labs website. Tap Get Labs. Tap OK or Download if prompted. Tap the "Download complete" notification. Tap INSTALL. Open the XDA Labs app. Tap the Apps tab. Search for the AdSkip app. Tap Cygery AdSkip. Tap the "Download" button. Tap INSTALL when prompted. Open Cygery AdSkip. Tap OK when prompted. Tap Cygery AdSkip Service. Tap the white "On" switch . Tap OK, then return to Cygery AdSkip. Enable the other AdSkip options. Close Cygery AdSkip.