Please provide a 0.7 playback speed.
I teach learners who are deaf or hard of hearing and use Stream to caption their mainstream teachers' videos. It's a great resource. When we are watching quite technical demonstration videos on YouTube, we set playback speed to 0.7 which means we can watch what's happening in the picture and have enough time to read the captions. The 0.5 playback speed you have on Stream is too slow. They get fed up and lose focus.