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Can anybody figure out the year?
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Around 1980 seems right. This was an Australian science show for children. Loved that show.
Now there is a children's show that doesn't talk down to the children.
There is an interesting series of 3 videos by vihart on the Fibonacci sequence and plants [1] that is done very well. It may interest you if you found the OP video interesting.

[1]: https://youtu.be/ahXIMUkSXX0