Translation:I see a building, a very tall one.
Are there any plans to offer a slow down version of the hearing parts?
Unfortunately not, because this course uses a live speaker rather than a computer voice.
I don't think any course using a human voice recorded all sentences twice (fast + flow). In fact, most of those do not even have recordings for every sentence in the first place.
Does Youtube need separate recordings for different speeds? It sounds a bit weird, sure, but slowing it optionally a little down is in my opinion just a programming thing.
This doesn't really help with DL questions, but I've found forvo.com to be pretty useful for listening skills. It usually only has words rather than sentences, and it doesn't do fast/slow, but it does have multiple speakers for more common words. I've found that to be very helpful in general.