slides onto the right side of the screen, and gameplay is displayed on it involving said character in this new form, with the same cursor clicking things on said phone.
then it fades out and you get a scrolling background wiht the logo of the game showing up on it.
Then there's Klondike and various clones where it always does the same thing, though seems to be about "how can I get away with massive insurance fraud by pouring what is obviously crude oil onto this blazing barn which SOMEHOW explodes like it's C4 and takes out the sawmill next to it oh well time to ignore that and feed the nearby cow some hay."
THEN there's War and Order and other strategy games(?) that ALL use the exact same trailer. I mean the exact same. You see a kinda averagely modelled bald 3d dude mine some rocks or chop some trees (or both) then he goes to a fence, sets, rotates and hammers one section of fence, then rotates an already in place section and hammers it, then places a gate, goes through, sets spiked barricades, then shoots some mobs with some other guys, dropping rotating resources.
I've seen similar, though in a different format, for Homescapes/Gardenscapes, Matchington Mansion, and now Lucy's Garden I think it's called? All match 3 games where you have an isometric perspective...
...except the ads all show NOTHING related to the gameplay, just kinda crude drawings of the characters as if animated in flash where the "player" makes a choice of various options to pass obstacles and ends up "failing" due to a bafflingly daft choice.