Welcome to GoY, Whitehorse!
Can you tell us which video you mean? There are many brands and sizes of curved pruning saws, often available from retail nurseries, garden centers, and some of the more complete hardware stores.

welcome from me too.
where in the UK are you [roughly]

B&Q Screwfix, Toolstation often stock quality pruning saws. I have the wolf & garten one and it is very good. I got mine from a local garden centre. Many of the garden centre chains also sell them.

Whitehorse isn't new on Goy though - usually does blogs on funny faces on trees and stones..

My OH bought his curved saw on line and likes it. Search for Silky Saw.

There is a GoY member called THE White horse ... I think this questioner has picked an almost identical user name!

it says he joined today hence the welcome. if he isn't a new member he is still welcome :o)

Wow, what a coincidence! What's a "The" between friends...

Ha, ha Stera!

exactly, I only noticed the date as the mouse hovered over it. ;o)

Whitehorse, you can answer us gabby gardeners by writing in the "Add comment" box, just as if you were answering your own question. All of us will be notified, and we can give your question a more exact answer, though Seaburngirl's and Steragram's answers are very probably useful