All of the videos I upload have the .mov extension.
Here are both with mp4 extension.
More then that, you use same codec as I am 
Only difference I upload videos with bigger resolution. But I think you personally don’t have any problems with viewing my videos.
By some reason people on Windows suffering.
And I can see yours fine.
My videos are iPad Pro screen recordings. After recording I upload the video to iMovie on the iPad and edit. Depending on the length of the video and file size, I export as either 360p, 480p or 720p to my iMac to stay within 30gb. There I rename and upload to the forum.
I can view your videos no problem however in general, I’m not a fan of dark mode.
This is programmers style of life
A spent a lot of time in front of the monitor at dark room or even at night. Dark mode is the must.
Wow that looks easy. I’m brand new to CAD so I’m still learning the basics. Not sure I know how to duplicate that. I have a lot to learn yet and it seems rather daunting.