It's a great video, but there is a difference between bitcoin and blokchain... The first part about bitcoin you are talking about blockchain, and the fact that users can send money to other users is thanks to the blockchain, when you say that the transaction is direct from one user to another isn't true, there are a 3rd party involved, and those are the miners, without them no one would be able to send money to other users.
But i really enjoy the animation and the voice is really clear, did you use any AI for the video?
Miners do check the blockchain to stay healthy and the longest chain is the chain we are going with

And I do think it's an AI, however, if I am wrong - the voice is impeccable for presentations!
Great job, OP.