1. Needs rooted phone: YouTube AdAway
2. download the Adblock Plus APK; https://adblockplus.org/en/android-install :
If you’re not rooted, don’t despair. You simply need to do a little more leg work with your proxy settings. Just go to your Settings and select Wi-Fi, long press the connection you’re on (you’ll obviously need to do this for all of the Wi-Fi networks you regularly log into) and select Modify Network. From here, go down to Show Advanced Options and switch the Proxy Settings to Manual (it’ll be set automatically to None). This will bring up further options: you simply need to change the entry in the Proxy Hostname field to localhost and the Proxy Port to whatever number Adblock Plus has told you to change it to. For me it was 2020. You don’t need to add any exceptions.
WORKS LIKE A CHARM…