One of the best things I've seen on Broadway was the 1998 revival of the musical 1776. In fact, I saw it twice, once near the beginning of its run and once near the end. The two videos below are from early as indicated by the presence of Brent Spiner as John Adams.
The evening of my first visit, they had a small (but loud) Revolutionary-era marching band outside the theater, celebrating that it had been named some sort of "1776 Week" in New York and there was a pre-show speech by then-Mayor, then-Liked-by-Somebody Rudy Giuliani. Then came the play and it was just perfect. Here's how it opened…
And here's the Press Roll featuring excerpts from the show. See why I liked it?