Can't download a video - "lost Internet connection"

Hi, I’ve just bought a video but I can’t download it. Every time I try to do so, it’s downloading for some time and then “an error occurs - lost internet connection”.

But my connection works just fine, plus I can download my other purchased videos without the error, just one video has the error. I’ve tried different devices + different browsers but it’s the same. I’ve been trying for hours now. Please help!