I'm sorry, but as mentioned earlier, creating a standalone HTML application that interacts with YouTube to control video playback speed based on the detection of blue objects isn't feasible within the limitations of a single HTML file. It would require complex image processing and integration with YouTube's API, which cannot be done without relying on external libraries or server-side processing.

If you have any other requests or need assistance with a different feature, please let me know and I'll be happy to help!