The film, which was released last week, stoked some old memories for Gilbert, who made his League debut in the 1960-61 season, late in the Original Six era (1942-67).
For example, Gilbert talked about the preferred mode of travel at that time, which was by train and, as detailed in the film, how veteran players would have the seniority to get the bottom bunk in the train car and rookies had to take the top.
"I got enough seniority after about five or six years to have a lower bunk," Gilbert said, "and then we started to fly."
Trottier said the old footage made him realize that the players who came long before him, Hall of Famers like Howie Morenz, Milt Schmidt, Georges Vezina, Eddie Shore and King Clancy, all discussed and shown in the documentary, were just like him, his fellow former players on the panel and, frankly, every player who has laced up the skates.
"They just wanted to play in the NHL, to play a game we loved to play, to hoist the Cup and get your name engraved on it," Trottier said. "We all share that bond."
Commissioner Bettman said he was taken aback by the fragility of the League in its first quarter century, before it hit its stride in the Original Six era.
The Commissioner said that as he watched the documentary he started to think about where the League is now, how well it's growing, where it's going with technology for fan engagement, and how it's spreading into new, vibrant markets like Las Vegas, and has done so previously to others like Tampa Bay, Nashville and Dallas.
"We are bigger and more accessible and better and stronger than we've ever been, which means the future is even brighter," Commissioner Bettman said. "That's perhaps the biggest way we've come or the longest way we've come in 100 years, because we're not fragile anymore."