AZ, I don't understand why you state at the start of the video that I didn't do a detailed walkthrough. I did, quite clearly, in this thread.
I'm about half through with your vid and still not quite sure why you end up abandoning the attempt. Your approach was quite different from mine (e.g. no cottages at all) and you managed to get Engineering before 600 BC which is significantly earlier than I did on this map. On the other hand your research post-Engineering is looking a lot weaker than what I had, since you didn't go for cottages. Also, by the time I bulbed Engineering all my infrastructure was ready (granaries, forges, barracks) and I'd already put out a lot of crossbows; so although I'm not that far into the video yet I'm foreseeing a comparable 1 AD situation between our approaches.
On the other hand, I'm starting to favor bulbing MC too, the way you do. I tried this once already and see that a philosophical leader can very reasonably get 3 GS and that seems to be slightly faster than teching MC conventionally. I still think some cottages are good though, because I prefer to be able to tech Feudalism -> Guilds reasonably fast after Engineering.