I see posts, here as well as in other discussions, advising someone to move out of an area perceived as dangerous.
For many people that is nearly impossible. They may not be able to afford a better place. They may be close to work or family, and moving further away would be a hardship.
Even people in better financial condition usually don’t want to move. Home is, well, home. Better to defend than leave, and we all hope for better.
As to modifying a rented place, some landlords get upset at mods they haven’t approved, and will require the tenant to undo them at their own expense. There are passive, removable door and window blocks that can be used, but people who can barely afford bus fare or good food will find it harder to buy accessories. Some, in order to afford a place, will share with someone over whom they have no control. A lot of people are in very complex relationships that leave them vulnerable, but are often the best they can do, given their resources.
The people in the video in this discussion can afford a camera and a gun, so they are likely at least a little above such a vulnerable level, but they still have their limitations which might include being unable to move. Finding ways to be safe in place might be the better direction for them.
Not everybody in danger is in the economic middle class, and even many of them have limited alternatives. Simplistic advice is not helpful.