The first one is known as Lil Blue Boo where a ghost introduces himself and says he has a surprise for you. That surprise being the creepy doll with a Scream. It then high fives a pumpkin. Link: youtube.com/watch?v=feVQ5shgNzs
This one is known as Scary Halloween Jack-In-The-Box. It shows a box and dares the viewer to click on it. First shows the Osmond siblings (I think) and Michael Jackson both with a Scream. Then it shows a skull with eyes and loud scream and flashing lights. The pumpkin then jumps. Link; youtube.com/watch?v=MTwibs8EzT8
They're both made by Flowgo (a website I used to go). Special thanks to the person who posted them.