The video in post 2 is from the time before I was born. But the scenery at the beginning of that video has not changed much. Also heavy horses can still often be seen there. They still help pulling logged tree trunks out of the woods. Several of the buildings along the original circuit are still there and unchanged too.
The course of the track was the same as in that video until the late 70‘. However, by the time I saw the first race there (the F1 GP in 1961, at least the first one I can remember), the quality of the whole circuit was significantly improved with a new layer of asphalt and the start/finish area was more straightened and the pits were completely renewed. (see the attached picture, showing the start of the 1962 F1 race, and me from the back next to the “14 km“ sign.
At 7:32 in that video you see Denis Jenkinson (on the left) who was very popular around Spa-Francorchamps. As a motorsport journalist he often expressed his high esteem about that place.
Also in the 60‘s & 70‘s the racing teams rented car garages around the race track and partly drove/rode the race cars/bikes to the paddock on public roads. I still remember Jim Clark testing a new engine in his F1 Lotus on public roads around the area late Saturday evening (the day before my father took the attached picture).
Francorchamps always had a unique atmosphere … and significant influence on me as a young boy.