enhance: add sophos direct link to video (#718)

Author: LaurenceJJones

crowdsec-docs/unversioned/integrations/sophos.mdx

@@ -59,6 +59,10 @@ The CrowdSec blocklist will be in plain text format, with one IP address per lin
 192.168.38.186
 ```
 
+## External Resources
+
+- [Video provided by Sophos on how to integrate CrowdSec](https://techvids.sophos.com/share/watch/2yEPSmMGQdhH4HnSXK9teU?autoplay=2&second=226.41)
+
 ## Contribute to this documentation
 
 Since CrowdSec is a community-driven project, we welcome contributions to this documentation. If you have any instructions or tips that you would like to share with the community, please feel free to open a pull request on our [GitHub repository](https://github.com/crowdsecurity/crowdsec-docs)