7 ms·

It's likely an arcing powerline (see the reddit comments): https://www.reddit.com/r/videos/comments/1lrk1rz/incredible_video_captured_during_alberta_storm/ http

• MisterTea 1y ago
  Reading through the comments and reviewing the video does indeed point to arcing power lines. Ive seen videos of fast moving arcs across medium voltage lines that looked like a horizontal jacobs ladder. The lines over current protection equipment might not instantly trip as the current might be limited by enough impedance in the equipment. Disappointing reveal.
• JKCalhoun 1y ago
  That sounds plausible.