Not even a little.
Aside from the (obvious) fact that something like the above done by one guy isn’t going to be the same quality level as a forest built with art from dozens of artists, there isn’t anything fundamentally “better” about the forest in the OP’s video.
What is different is likely down to having a team of artists versus a single artist. For anything that isn’t, it’s not likely to matter for the quality bar that non-AAA studios can hit, anyway.
I didn’t see anything “amazing” in the OP’s video in regards to the forest scene. It’s really high quality art. That’s 90% of how good it looks.