How can I wirelessly transfer video from iPhone to Mac?
I know you say you do not want to install. But you can get a free Dropbox account.

Install it on you Mac and iOS device.

Then in the iOS Dropbox. 

Tap the 3 blue circles in the Menu bar.





Select the + Upload menu.







Allow Dropbox to see you Photos if Asked.

Navigate to the camera roll or Album that contains you video.

Tap it/them to select it/them

Tap The Upload menu to upload.

Once done they should be on you Mac.