content: We have cell phones. As noted in the video, one of these points is also in Hawaii. So you can verify with a buddy in the location in question. If you trust them.    A similar exercise can be done with friends you trust to try to measure the height of the sun using basic trig and measurements in cities all on the same day. Cities like Chicago, Saint Louis, and New Orleans (all Noon at the same time)  Do the angles match a round earth or a flat earth. The angles are easily figured out by measuring shadows of something like a traffic meter. or a telephone pole or even a basic metal stake. that is as good as you need for objective evidence.