Fashion shows are, in fact, slated for specific dates and times, and showing up late no matter how traffic congested Milan or London can be that day is never an option.
Look for the ones that sponsor internationally famous runway models, whether they are alternative or more conventionally high fashion.
The latest videos are posted at 1080p and even if you browse Met Art more than once a day you are going to find updates four or five times every single day which is not something you can see on other websites.