How British spooks have verified video: http://hummingbirdclock.info/about http://hummingbirdclock.info/about "The UK national electrical grid delivers power

How British spooks have verified video: http://hummingbirdclock.info/about http://hummingbirdclock.info/about "The UK national electrical grid delivers power across the country. This mains power supply makes a constant humming sound, yet there are tiny changes to the frequency of this sound every second. Most recordings made in the UK have a trace of mains hum on them and this can be forensically analysed to determine the time and date they were made, and as a result, whether anyone has edited the recording."