Yes, we have Already Designed the Chrome Extension Similar to the Tube Buddy!
Well, we have recently designed a similar chrome extension for our client in the UK. He wished to have the chrome extension for the YouTube like the Tube Buddy. Due to the NDA signing we have handed over the Source code with him, but we can design it for you again with the little changes.
We will be responsible for updating changes and new features for the new version of the Chrome extension.
I would suggest arranging our first voice or video call. This call will help you to ask me questions to make sure that I have the proper technical knowledge to complete this project.
Thanks
Fahad Maqsood