These organizations spend every single day of their professional lives dealing with the logistics of events in the most congested cities on the continent. They don’t need to be told simple things like “leave early”.
As noted upthread and elsewhere on the internet, NHL teams in Toronto stay at one of several hotels (Ritz, Fairmont, Marriott, Westin) which are all <15 minutes walking distance from the arena. They
do stay close and leave early. In the event that the city is at a standstill, which seems to be increasingly common in Toronto, they will do exactly what you see in that video — go to Plan B, a short walk like teams and performers do routinely in Manhattan.
It seems that, for whatever reason, Toronto has built itself into unusually chaotic traffic issues which are leading to multiple events being impacted — not just NHL games but
concerts as well. Blaming that on the visitors is an odd deflection. It’s up to the city to manage its business. Visitors can and do figure out how to work around those issues, but naturally it puts the city in a bad light when these things are necessary on a regular basis.