Last season, the Hornets' home game against the Red Devils was the only of the four to be broadcast - and saw them register a historic 3-1 win over Jose Mourinho's side.
The Premier League fixtures have thrown up an emotional debut for Hernandez who returns to the ground where he made his name in football.
The Mexican scored 37 league goals in 103 appearances for Manchester United but many of those appearances were from the bench.
"All I know is that I'm very happy to be back in England, very glad to open a new chapter of my career in the Premier League, and the best way to start will be to try and deliver a good performance for West Ham".
"As to celebrating, I don't know", he continued.
Hernandez joined Slaven Bilic's side for a reported £16million this summer from the club United sold him to, Bayer Leverkusen, but the 96-time Mexico global declared he had no regrets about his exit from the Reds.
He said: "I have no regrets, I never have any regrets in my life".
"It's my old club, my old fans, my old stadium but it'll be my first goal for West Ham".
Hart was also asked during the video who is the best goalkeeper in the world, he replied: "It's either David De Gea or Manuel Neuer from me at the moment but special shout to Gianluigi Buffon because he's the man". "Coaches know your strength, the opposing players read you better, they know what you do and what you don't so the second season tends to be more hard", Yeboah told KweséESPN.
"One thing I don't want to change, even if I am 40 years old, is the hunger I have inside". If he plays as fast as he talks then it is going to be very exciting for West Ham.