There are downloadable MP4 format videos entitled Afghanistan Train Line, Coal Baghlan Province and Gold Mine on the website of Awaz News, “an Afghan independent news agency operating throughout Afghanistan and providing in-depth reporting to television and radio networks.”
On the “Economy/Infrastructures” section of the website, the “Afghanistan Train Line” (13 minutes) video includes images of bridges and construction sites, along with Iranian flags. While the commentary is not in English (presumably it is Dari – can anyone confirm?) there are some recognisable place names. From this, I think the video might well show hard evidence of construction works underway for the Iran to Herat railway. The video shows bridges and cuttings, but no sign of tracklaying or railway systems installation.
The computer generated impressions of trains are clearly not of Afghanistan – they appear to show Skoda CityElefant electric trains from the Czech Republic.
The mines are covered depth in the “Coal Baghlan Province” video (13.5 min) on the Natural Resources section of the Awaz News website, this video is well worth a watch if you are interested in industrial things.