Step #1: You will have download QuickShortCutMaker application (apk) and save it in an SD card which will insert during process.
Step #2: Press the Power button to pop up the power menu (Restart). Touch Restart to reboot your phone.
Step #3: Now, once on the setup screen. Hold down two fingers on the screen for few seconds until the TalkBack is enabled.
Step #4: With the TalkBack switched on. Draw or write letter "L" on the screen to pop up menu and choose TalkBack Settings.
Step #5: Now hold down simultaneously volume down and up key for few seconds until a message of Accessibility Shortcut pops up and tap OK twice.
Step #6: Repeat the hold on volume up and down button simultaneously for few seconds (Keep holding till TalkBack is disabled).
Step #7: Now that the TalkBack is disabled scroll down and touch Help & feedback.
Step #8: From the help menu open "Get started with Voice Access".
Step #9: You will have to play the YouTube video and tap the share key at the top right of the video.
Step #10: Choose more key (usually the three dots) which will enable the video open fully on YouTube.