Karuna Productions : The Joy of Devotion - Full Documentary.

  

The 10,000 years of a Golden age in Kali-yuga is from Srila Prabhupada and is in his books.

Srila Prabhupada - “10,000 years of the saṅkīrtana movement was inaugurated by Śrī Caitanya Mahāprabhu 500 years ago''. SB 8.5.23

Srila Prabhupada - “It is said that the Krishna consciousness movement will be prominent within the next ten thousand years, but after that people will all become mlecchas and yavanas.

Thus at the end of the yuga, Krishna will appear as the Kalki avatara and kill them without consideration''. Sri Caitanya Caritamrita. Antya-lila Chapter 3 Text 50

Srila Prabhupada - “When Śrī Caitanya Mahāprabhu appeared, He ushered in the era for the saṅkīrtana movement.

It is also said that for ten thousand years this era will continue.

This means that simply by accepting the saṅkīrtana movement and chanting the Hare Kṛṣṇa mahā-mantra, the fallen souls of this Kali-yuga will be delivered.

After the Battle of Kurukṣetra, at which Bhagavad-gītā was spoken, Kali-yuga continues for 432,000 years, of which only 5,000 years have passed.

Thus there is still a balance of 427,000 years to come.

Of these 427,000 years, the 10,000 years of the saṅkīrtana movement inaugurated by Śrī Caitanya Mahāprabhu 500 years ago.

This provides the opportunity for the fallen souls of Kali-yuga to take to the Kṛṣṇa consciousness movement, chant the Hare Kṛṣṇa mahā-mantra and thus be delivered from the clutches of material existence and return home, back to Godhead''. Srimad Bhagavatam Canto 8 Chapter 5 Text 23