The NOS (Dutch Broadcasting Foundation) still provides Teletext via their website[1] that is still used quite a lot for its short format. There is also a public API[2]
[1]: https://nos.nl/teletekst [2]: https://teletekst-data.nos.nl/json
[1]: https://nos.nl/teletekst [2]: https://teletekst-data.nos.nl/json
Some picks:
English news: https://yle.fi/aihe/tekstitv?P=190
Seasonal calendar: https://yle.fi/aihe/tekstitv?P=830
Museum of Teletex Art: https://yle.fi/aihe/tekstitv?P=805