Poached Eggs is the first episode of Angry Birds and the very first episode of any Angry Birds game. It consists of three themes, all of which take place on a large plain during different times of the day, each containing 21 levels. If the cinematic trailer does take place during Poached Eggs, the pigs steal the eggs while the birds defeat an insect who landed on one of the eggs.
This is the only episode in the original game where the Bad Piggies do not use any special technique to capture the eggs (e.g. in Danger Above, the pigs use balloons to capture the eggs).
This is the second-longest episode in the entire Angry Birds Series, consisting of 63 levels. The first is Pig Days, from Angry Birds Seasons with 93 levels.
In Mobile, the pigs change into Angry Birds Chrome sprites upon the release of the Short Fuse update, alongside other episodes.
In the current final cutscene, the eggs' size is larger compared to the birds, larger than King Pig.
In the old version of the opening cutscene, Chuck had a prototype design that was never used in any other Angry Birds/Bad Piggies media. Eventually, the opening cutscene was modified to have the characters' standard designs, including Chuck's design.
Notice that in the old version of Cutscene 1, Chuck's design in the Cutscene has a different design that has never been used.
The first cutscene as it now appears in Angry Birds Classic.