Repository: yt-dlp
Issue: [Dropbox] extract duration
Labels: site-enhancement,patch-available

### DO NOT REMOVE OR SKIP THE ISSUE TEMPLATE

- [X] I understand that I will be **blocked** if I *intentionally* remove or skip any mandatory\* field

### Checklist

- [X] I'm reporting that yt-dlp is broken on a **supported** site
- [X] I've verified that I have **updated yt-dlp to nightly or master** ([update instructions](https://github.com/yt-dlp/yt-dlp#update-channels))
- [X] I've checked that all provided URLs are playable in a browser with the same IP and same login details
- [X] I've checked that all URLs and arguments with special characters are [properly quoted or escaped](https://github.com/yt-dlp/yt-dlp/wiki/FAQ#video-url-contains-an-ampersand--and-im-getting-some-strange-output-1-2839-or-v-is-not-recognized-as-an-internal-or-external-command)
- [X] I've searched [known issues](https://github.com/yt-dlp/yt-dlp/issues/3766) and the [bugtracker](https://github.com/yt-dlp/yt-dlp/issues?q=) for similar issues **including closed ones**. DO NOT post duplicates
- [X] I've read the [guidelines for opening an issue](https://github.com/yt-dlp/yt-dlp/blob/master/CONTRIBUTING.md#opening-an-issue)
- [X] I've read about [sharing account credentials](https://github.com/yt-dlp/yt-dlp/blob/master/CONTRIBUTING.md#are-you-willing-to-share-account-details-if-needed) and I'm willing to share it if required

### Region

United States

### Provide a description that is worded well enough to be understood

I cannot find the duration of a dropbox video using youtube dlp. It returns NA instead.

### Provide verbose output that clearly demonstrates the problem

- [X] Run **your** yt-dlp command with **-vU** flag added (`yt-dlp -vU <your command line>`)
- [X] If using API, add `'verbose': True` to `YoutubeDL` params instead
- [X] Copy the WHOLE output (starting with `[debug] Command-line config`) and insert it below

### Complete Verbose Output

```shell
[debug] Command-line config: ['--print', 'duration', 'https://www.dropbox.com/scl/fi/t7i5f3uahao7q1z1z2r4t/4.30_OW_UMDVsW-M.mp4?rlkey=zccyhcoxwvx0f74dt7x4uu89j&st=kzw1opdk&dl=0', '-Uv']
[debug] Encodings: locale UTF-8, fs utf-8, pref UTF-8, out utf-8, error utf-8, screen utf-8
[debug] yt-dlp version nightly@2024.07.19.025855 from yt-dlp/yt-dlp-nightly-builds [a3bab4752] (pip)
[debug] Python 3.11.7 (CPython x86_64 64bit) - macOS-12.1-x86_64-i386-64bit (OpenSSL 3.3.1 4 Jun 2024)
[debug] exe versions: ffmpeg 6.0 (setts), ffprobe 6.0
[debug] Optional libraries: Cryptodome-3.20.0, brotli-1.1.0, certifi-2023.07.22, mutagen-1.47.0, requests-2.32.3, sqlite3-3.45.3, urllib3-1.26.18, websockets-12.0
[debug] Proxy map: {}
[debug] Request Handlers: urllib, requests, websockets
[debug] Loaded 1829 extractors
[debug] Fetching release info: https://api.github.com/repos/yt-dlp/yt-dlp-nightly-builds/releases/latest
Latest version: nightly@2024.07.19.025855 from yt-dlp/yt-dlp-nightly-builds
yt-dlp is up to date (nightly@2024.07.19.025855 from yt-dlp/yt-dlp-nightly-builds)
[Dropbox] Extracting URL: https://www.dropbox.com/scl/fi/t7i5f3uahao7q1z1z2r4t/4.30_OW_UMDVsW-M.mp4?rlkey=zccyhcoxwvx0f74dt7x4uu89j&st=kzw1opdk&dl=0
[Dropbox] t7i5f3uahao7q1z1z2r4t: Downloading webpage
WARNING: [Dropbox] unable to extract OpenGraph title; please report this issue on  https://github.com/yt-dlp/yt-dlp/issues?q= , filling out the appropriate issue template. Confirm you are on the latest version using  yt-dlp -U
[Dropbox] t7i5f3uahao7q1z1z2r4t: Downloading m3u8 information
[debug] Formats sorted by: hasvid, ie_pref, lang, quality, res, fps, hdr:12(7), vcodec:vp9.2(10), channels, acodec, size, br, asr, proto, vext, aext, hasaud, source, id
[debug] Default format spec: bestvideo*+bestaudio/best
[info] t7i5f3uahao7q1z1z2r4t: Downloading 1 format(s): original
NA
```