Was just down there in 2018 with my sister and BIL and a niece and did one of the bus tours. As much as I had been down to the D.C. metro area over a 20 year period (including a little over 10 years ago when I was commuting down there almost every month for course work), I hadn't been in D.C. proper since the early '90s. And when I saw that pic of "the castle" in your OP video montage, I remembered the bus going by that and my snapping a quick pic of it as the bus was crawling along. The building is still there. 
From what I gather, the Capitol (notably the dome) was undergoing renovations as part of the 2009 ARRA ("American Recovery and Restoration Act" a/k/a "stimulus" ) funding, like many federal buildings, including the one I worked in back then... and in its case, with work starting in 2014.
So this last time I was down there, that was all done and the scaffolding had finally been cleared away. They did a nice job on it just from viewing the exteriors (the bus went all around it and in one of the entrance driveways to it). 
https://blogs.loc.gov/picturethis/2016/05/under-construction-the-u-s-capitol/
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