On the evening of June 1, a large lightning storm passed through the area. (You can even see the storm's clouds continuing on towards Maine in your video.) https://imgur.com/a/LcM8sMe https://www.blitzortung.org/en/historical_maps.php?map=30
Waves of wildfires starting in the same day can happen by natural causes like a dry storm, but are also a typical signature in wildfires linked to criminal activity. Example: 121 provoked wildfires in the same night and council in North Spain March 2023, a few days after the police stopped a narco operation.
There are some suspicious trends, there is a wave of fires aiming to overpower the firefigthers capability to react. Often at night or weekends. The first spots burnt are often delimited by administrative frontiers, the string of fires follow a road, and fires extinguished reactivate often in the next nights.
The fire starts first on internet. Wildfires are also typically coupled with cyberwarfare mocking environmentalism and scientific facts on social webs and journals.
The criminal thinks that is a hero or adopts a role of victim. There is a lot of self-justifying and blame deflection towards other targetted groups.
At least in Southern Europe this is a reaally common pattern. Your mileage may vary.
[1]https://www.nwcg.gov/publications/pms437/fuel-moisture/proba...