I’ll look.
When we first cut the cable cord, got Roku, and were able to watch YouTube on the big tv, one of the first things we watched was the old British TV story, ‘Quartermass and the Pit’. I think there were several Quartermass series; I don’t think they’re on YouTube anymore, but maybe you can find them:
https://en.wikipedia.org/wiki/Quatermass_and_the_Pit
Quartermass and the Pit.
The story first seen as a movie titled “5 Million Years to Earth. It was never forgotten as it was seen at the time of the grasshopper invasion here in Texas. So bad they ate the bark from trees.
It was found on Roku in the original version of BBC broadcast with a few others. Exactly which Roku channel carried it, no idea. Actually, it might have been found via the Wayback Machine and loaded from the Smart TV.
Quartermass/Pit (BBC Broadcast) is found on YouTube in several uploaded installments, along with other Quartermass episodes. Try Google asking for You Tube BBC Quartermass