Stop YouTube Autoplay:
Some times it is annoying when you open a YouTube video and it automatically start playing the video even when it is not completed the video buffering. If you have a slow internet or you are using your bandwidth for download something else, YouTube video may not play smoothly before it is not fully loaded. Because YouTube player always autoplays all videos and it dose not offer any option to disable it, this condition forces YouTube user to pause the videos right at the beginning to allow the gray loading bar to load for a while and play it after.
If you are a Chrome user you can use Stop Autoplay for YouTube or Stop Autoplay in Background Tabs extension to automatically pause YouTube every time you open a YouTube video. For Firefox, Internet Explorer, and Opera you can use YouTube Auto Buffer or YousableTubeFix userscript to stop YouTube autoplay.
How to Stop YouTube Autoplay:
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