I use FreeTube and Tubular (NewPipe fork) and haven’t had any trouble with any of these frontends. And when I reproduced Piped issue 3658 the video loaded as expected. I’m not sure if this new block has been fixed already or that I’ve had incredible luck (it seems YT is A/B testing the block). Invidious is still broken, though.
Edit: Piped and yt-dlp have worked around 75% of the time. FreeTube and Tubular don’t seem to be affected.