Reckless driving is probably a misdemeanor.....some misdemeanor crimes have a presence exception and others do not....meaning if the officer wasn’t a witness they write a report and a detective and/or prosecutor decide.
The other possibility is that none of the video captured the car being driven recklessly..AND a clear image of who was driving....or none of the witnesses could positively ID the driver.
You’re correct, in the video a driver can’t be identified but they were driving recklessly in my view.
The vid I saw yesterday showed a guy walking down the driveway and saying to a reporter he had diplomatic immunity and could have him killed or some such garbage.