Gotthard Tunnel Opening Ceremony full 6 hour RT here -

2 parts - Part 1 starts around 1:58:00 i suggest scanning the first part to get a grasp of the scale of this event before watching. The event will require your attention to fully grasp why I claim this is the scariest thing I have ever seen.

Part one is a head scratcher. Part 2 is pure evil. Skim intermission train ride to find heads of state and government officials who were in attendance. Germany's Angela Merkle is a notable face.

Part 2 starts at 5:57:00.

Each part is roughly 35-45 minutes.

https://youtu.be/I4NU0Tok1T4