fix download issue
diff --git a/youtube_dl/extractor/dtube.py b/youtube_dl/extractor/dtube.py
index 5887887e15e..20190c9cc42 100644
--- a/youtube_dl/extractor/dtube.py
+++ b/youtube_dl/extractor/dtube.py
@@ -48,7 +48,7 @@ def _real_extract(self, url):
         def canonical_url(h):
             if not h:
                 return None
-            return 'https://ipfs.io/ipfs/' + h
+            return 'https://video.dtube.top/ipfs/' + h
 
         formats = []
         for q in ('240', '480', '720', '1080', ''):

thx to @GianlucaFicarelli

### Before submitting a *pull request* make sure you have:
- [x] At least skimmed through [adding new extractor tutorial](https://github.com/rg3/youtube-dl#adding-support-for-a-new-site) and [youtube-dl coding conventions](https://github.com/rg3/youtube-dl#youtube-dl-coding-conventions) sections
- [x] [Searched](https://github.com/rg3/youtube-dl/search?q=is%3Apr&type=Issues) the bugtracker for similar pull requests
- [x] Checked the code with [flake8](https://pypi.python.org/pypi/flake8)

### In order to be accepted and merged into youtube-dl each piece of code must be in public domain or released under [Unlicense](http://unlicense.org/). Check one of the following options:
- [ ] I am the original author of this code and I am willing to release it under [Unlicense](http://unlicense.org/)
- [ ] I am not the original author of this code but it is in public domain or released under [Unlicense](http://unlicense.org/) (provide reliable evidence)
- [x] this is a fix motivated by @GianlucaFicarelli

### What is the purpose of your *pull request*?
- [x] Bug fix
- [ ] Improvement
- [ ] New extractor
- [ ] New feature

---

closes #18741 

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