Personally, I was hoping for a comparison video of the Phantom Troupe Requiem sequence, but what Hillua has constructed is still quite impressive. In the latest Hunter x Hunter juxtapositions, we see Gon and Killua's escape as depicted in the 1999 Nippon Animation version versus the 2011 Madhouse series, and the Chrollo Lucilfer fight from episode 52.
Gon × Killua × Escape 2011 1999 Comparison
Chrollo VS Zoldycks 2011 1999 Comparison
If you didn't watch the older series, the 1999 version of the Requiem scene