Ask HN: Costs for a YT-dislike button browser plugin?
I'm considering the development of a simple browser plugin that would reinstate the "dislike" button on youtube videos as far as its informativeness for viewers is concerned: You'd be able to click (the plugin's) dislike button and see the count just like before, but of course that information would not go into YT's ranking.
This requires some backend functionality, mostly a database that maps URLs to counts (+ plus the server code to make that work). I expect this to be costly. But how much would you estimate for this?