Letter to YouTube Developers: RTL/LTR hyperlink bidi bug

This is a practical bug report about YouTube text input/display for mixed right-to-left and left-to-right writing.

Chat/session example:
https://chatgpt.com/share/6a451a93-da0c-83e8-acf6-2236aa6e309e

Problem: RTL languages such as Arabic, Farsi and Hebrew become unreliable when pasted into YouTube comments, descriptions or posts with LTR hyperlinks. The text may look correct while composing, but after posting it can reorder visually, attach punctuation to the wrong side, split or misplace URLs, or make a multilingual sentence appear backward or confusing.

This especially affects creators trying to communicate across English plus Arabic, Farsi, Hebrew, Russian, Ukrainian, Spanish, Chinese and other languages. The problem is worse when a line includes both RTL text and raw hyperlinks such as https://example.com.

Why this matters:
- Multilingual creators cannot reliably address global audiences.
- Civic, educational, religious and diplomatic messages can be distorted.
- Readers may think the creator made an error or wrote something misleading.
- Automated moderation may misread reordered text and links.
- Accessibility and internationalization suffer.

Requested fixes:
1. Provide a reliable bidi-aware composer and preview.
2. Preserve Unicode direction controls where safe.
3. Offer per-line direction controls: LTR, RTL and Auto.
4. Treat URLs as isolated LTR spans inside RTL paragraphs.
5. Allow creators to wrap links in visible link cards or isolated hyperlink objects.
6. Show the exact post-rendered result before publishing.
7. Document the recommended Unicode controls for YouTube posts, comments and descriptions.

This is not a cosmetic issue. It affects public-interest communication, international education, religious dialogue, peace advocacy, journalism and multilingual accessibility.

Please make YouTube text fields reliably support mixed RTL/LTR writing with hyperlinks.