I didn't navigate from anywhere if that's what you mean, I used the same link format as the other games and found it.
Here if anyone still needs it: https://www.brightonandhovealbion.com/matches/fixtures/first-team/201718/july/southend-united/
You can watch the full matches back, with commentary. I'm going to half the friendlies and most of the games and I still consider it value for money over the season.