The song is from 'The World of The Seekers' DVD.
I've enhanced the video and the audio now plays at the correct pitch. More videos from Judith and The Seekers on the playlists below:
Gospel & Inspirational favourites:    • Judith Durham / The Seekers  Gospel ...  
Best of the 60s in stereo:    • The Seekers  I'll Never Find Another...  
Reunion Performances:    • The Seekers  I Am Australian (Live, ...  
Best of Live 19992014:    • Best of The Seekers Live, 19992014  
The Seekers concluded their Golden Jubilee tour in New Zealand in November 2014, and Judith Durham began her farewell tour there in April 2016. Visit http://www.TheSeekers.com.au and http://judithdurham.com for more info and news, or join us on Facebook:   / 99634296559  

Official Facebook pages:
  / theseekersofficial  
  / judithdurhamofficial