You can skip to the specific sites by clicking the designated chapters to see how to resolve the issue.
Chapters:
0:00 Mapping Explained
1:05 Stubhub
10:17 Vivid Seats
13:01 Ticket Network
14:02 Seatgeek / Tickpick / Gametime / Ticket Evolution
14:40 Ticketmaster
19:12 NFL
23:32 MLB