Setting dir=auto globally across all websites, like YouTube, isn't as straightforward as you might hope because browsers are built to display pages how the developers intended, following web standards to keep everything consistent. There aren't built-in settings to change HTML attributes everywhere due to concerns about security, performance, and how well it would work on complex sites. If browsers let you make such broad changes, it could slow things down or cause odd issues, especially on sites with dynamic content or intricate designs. But if you're comfortable with a bit of tech tinkering, browser extensions or user scripts can be a handy workaround. Tools like Tampermonkey or Greasemonkey allow you to run custom JavaScript on web pages, so you can set dir=auto for text elements where it makes sense. These scripts work on a per-page basis, giving you the freedom to target specific parts without messing up the whole site.