Why it worked
The video taps into the popular "building" or "unboxing" trend, showcasing a desirable product (Lego Avengers Tower) with a clear value proposition (low cost, good appearance). The "day 3" framing creates a sense of ongoing progress and encourages viewers to follow for the final reveal.
Summary
The video shows the progress of building a Lego Avengers Tower purchased from AliExpress over three days. It highlights the cost and appearance of the set, the time it took to arrive, and encourages viewers to follow for more updates.