new .gif to manual-certificate.md

docs/adguard-for-android/solving-problems/manual-certificate.md

@@ -11,7 +11,7 @@ This article covers AdGuard for Android, a multifunctional ad blocker that prote
 
 To be able to filter HTTPS traffic (which is extremely important as most ads use HTTPS), AdGuard needs to install a certificate into your device's user storage. On older versions of Android OS this was done automatically, but on Android 11 and later users have to [install it manually](../../overview#https-filtering).
 
-![Certificate *mobile_border](https://cdn.adtidy.org/public/Adguard/Blog/Android/3-5/cert-en.gif)
+![Certificate *mobile_border](https://cdn.adtidy.org/content/kb/ad_blocker/android/solving_problems/manual-certificate/video.gif)
 
 If you experience issues during the manual certificate installation (for example, you installed the certificate, but the application keeps ignoring it), you can follow one of the solutions below.