It is not known for certain when this film marked as “Colour Test Footage” dates from. However, the one-man-band performer is Don Partridge, "King of the Buskers" who appeared in Belfast in both mid-March and the first week of June in 1968 so those dates are both good bets. It's likely that footage was taken during the recording of the series "Whowhatwhenwhereandwhy?" (thankfully this was usually referred to as the easier to say W5!) and the UTV presenters of that series, Ernest Strathdee and Gordon Burns, can be seen chatting to each other on set.
Press reports suggest that UTV had planned a new purpose built colour-capable studio on the Annadale Embankment in Belfast in 1969, but these plans were then shelved. UTV’s progression into colour didn’t happen until September 1970 but was then shelved again due to a strike and UTV were still making programmes in black and white throughout 1971. This very colourful footage test footage was therefore several years ahead of UTV's eventual transition to colour programming.