Sorry, but I see nothing in that video that shows your phone was compromised at all. Don't know what company you are communicating with that is supposedly resolving a problem, but you do not want to give them your Apple Account password or download and allow them access to your iPhone through remote sharing software such as Zoom (or any other similar tool). That is not a hack or Malware, it is simply allowing someone to view your screen that you should not. That type of software is legitimate, but can certainly be used for nefarious purposes. Not a hack or malware though.
Also review in Settings the apps you have allowed to send Notifications that appear on your screen, and turn off any third party apps. AirDrop is only possible from another device within Bluetooth range (about 30 ft), and you cannot AirDrop over the internet.
When in doubt you always have the option to Factory Reset your Mac. Make sure you have a backup and you would want to manually restore applications, otherwise everything would be loaded back to the same state it was before.
Erase your Mac and reset it to factory settings - Apple Support