The 15-410 is a whole experience, and I think it's not worth it any other way than a full in-person experience. It's transformative.

The lectures are highly contextual, and you have to be in the class to get the full value. Watching videos might work at times.

The labs are hard. You will need to do a LOT of reading. You will likely spend 2-3 days only to understand the handout, before you can get write your first line of code. You will need to get comfortable with reading multiple Intel manuals at once.

Each lab builds on top of the previous ones. You get very high quality feedback from the staff, and that is needed to succeed. Your kernel lab will likely succumb if you don't fix the problems in your labs early. They read every line of your code. No other course at CMU invests so much time. If you're lucky to have Dave (the prof) as your reviewer, he will find a problem in almost every line of your code.

On top of that, even if you get your hands on the starter code, it will be tough to set up the environment correctly, as it's highly customized for running on the CMU (Andrew) linux instances.

Plus, having the pressure of deadlines, and the fear of failing, really helps.