## Issue
Closes 3964 `Add Youtuber info to file page`
## Changes
(1) Refactor the YT-info query into `YoutubeBadge` component.
(2) For the File Page case, don't show "- last sync <date>" since the date has nothing to do with the file.
## Test
[x] YT Channel page
[x] YT Channel's claim page
[x] Non YT Channel page
[x] Non YT Channel's claim page
[x] No channel (anonymous) claim page
[x] Various RENDER_MODES
## Issue
- The diff for new strings are polluted by the need to add a comma to the previous entry.
- Having to re-add the newline at the end of file before commiting is a repetitive pain.
## Caveats to this approach
- When manually adding strings, developers need to put it above the `--end--` entry. Hopefully it is obvious without having to put verbose comments like "^--- add new string before this line ---^"
- Translators will surely ask how to translate "--end--".
## Issue
Fixes 4293 `Better download link support`
- [x] make it so you can right click a download button > copy download URL
Given that this could be useful in mobile/web as well, I used a button+modal instead of the right-click approach.
- [ ] in share dialog, show download URL to copy for non-video content
This is already implemented, albeit hidden in the "More..." expansion.
Fixes #-4021.
## Changes:
When the autoplay overlay gets partially off-screen, the timer will be stopped. We can tweak how much down it needs to be scrolled.
When timer is paused, the countdown resets.
The pausing mechanism has no effect on the floating player (since the 'top' can never go negative). This behavior is the same as another big video platform.
---Fixes:
#-2882: "Fix UX around publishing to already published URL".
---Changes:
1. Improved the error message (change color to red; emphasized the URL; tweaked the sentences a bit).
2. The `Publish` button will be grayed out in this scenario, until user explicitly decides to edit existing claim instead.
