(this is not about the OP video -- haven't watched (yet?) -- this is just on the subject of creating plans and some of the above comments)
Everybody's gonna do what they're gonna do. (I know it doesn't sound like much, but
to me that is actually profound.) There are only patterns one can follow (or not) that may match those of other people (or not). Any advice or suggestions about what's "better" for others, or saying that someone was "unhappy because of ...", or that someone is "wasting their life", or wondering "why did he kill himself?!" or, even worse, accusing someone of killing themselves, or suggesting they improve their diet, start exercising, etc. to "improve their life" -- all of that is mostly just meaningless talk, likely designed (consciously or otherwise) to make oneself (and/or others)
feel better, and/or appear to others in a better light. 99% of the time it bears no value whatsoever to the people at which it is directed. Thou shalt not judge and all that. [/rant]
It's perfectly human, of course, to think "I've got it right!" -- it just doesn't mean others got it wrong. The others think using very, very similar patterns.
Happiness is as personal(ized) a thing as it gets. You can be just as happy doing all the wrong things, as you can be unhappy doing all the right ones.