^^ I hear you although the game might lose its challenges were it to become less restrictive. In addition, the lower deck needn't be tunneled. By the way, I've found 11-tile spacing for tunneled subways easily doable. A dynamic example wherein I'm sometimes compelled to increase the signal spacing to 13 tiles ends this post.
Could you make your Video with OBS, Shadow Play or other Dislay recording Software and not filming your Monitor?
Heh heh..all these years until just last week I'd very often found myself wondering why so many people filmed their videos or films in drafty areas, because just like my earlier clip here waviness blights output they share. I never filmed my screen. Its wavy appearance comes from the second tool, the timelapsing one; I'm satisfied with my screen capturing app. I'm glad you asked me this, because I browsed around for another one: might the following output of mine be satisfactory, because now the timelapsed motion of panning around the map brings on bluriness?
A 7¼-minute (10½-month) ride along the fictitious ⑩ Line: https://youtu.be/g9KOzVoKwow