Vectrex startup and buzz

A GCE Vectrex console is turned on, and emits its characteristic buzzing noise as it plays the standard startup tune, followed by the theme for Sean Kelly's Vectrex Multi-cart 3.0.  The buzzing changes frequency and tonality as the CRT displays different content, prior to being turned off.

The Vectrex itself is a relatively rare and expensive American "home arcade" console with a vector display (like Asteroids).  It is estimated that fewer than a million of these consoles were made between 1982 and 1984, perhaps only several hundred thousand.  Due to the decision to place the amplifier for the built-in speaker on the power board, early models of the Vectrex made a distinctive buzzing noise due to electrical interference.  Given their age (and the relative fragility of the built-in CRT display), as well as the relative popularity of "no-buzz" modifications to remove the buzzing sound among Vectrex enthusiasts, the Vectrex buzz, rare to begin with, is only getting more rare with each pa