What are some alternatives?
When comparing Time 2 and Invideo for Youtube, you can also consider the following products
Effortless - Stay focused and beat procrastination on your Mac.
vdNote - Share noteworthy moments from YouTube videos.
Countdown Screensaver - A Mac screensaver for counting down to a date 🖥🕐
Bookmark It - Create awesome notes on YouTube videos
Pomodoro.cc - Manage your time more effectively - Boost your productivity
Keyword Search in YouTube Video - Search for a text in a youtube video and jump to that part.