Are documentaries accurate to the portrayal of historical timelines that happened throughout history?

I suggest you read this short article - how Ken Burns made The Civil War come to life.

https://www.neh.gov/humanities/2015/septemberoctober/feature/the-civil-war-ken-burns-reinvented-the-television-history-d



Many (if not all) of the battle locations were filmed on the same calendar day, same time of the day as when the original battles took place... different century, of course.

Some are better than others. You have to do your due diligence to find the well researched/argued ones.

Depends on who makes them and why..

Only tangible tactile real life experiences do that

No.