Add a video to Private DNS overview

Plus small fixes

.markdownlint.json

@@ -3,6 +3,13 @@
     "ul-style": { "style": "dash" },
     "emphasis-style": { "style": "asterisk" },
     "no-duplicate-header": { "siblings_only": true },
+    "no-inline-html": {
+        "allowed_elements": [
+            "br",
+            "details",
+            "iframe",
+            "summary"
+    ]},
     "no-trailing-spaces": { "br_spaces": 0 },
     "line-length": false,
     "no-bare-urls": false,

docs/private-dns/overview.md

@@ -15,7 +15,9 @@ Quick link: [Try AdGuard DNS](https://agrd.io/download-dns)
 
 ## What is Private AdGuard DNS?
 
-Private AdGuard DNS is a DNS server that, in addition to benefits of a public DNS server (such as traffic encryption and domain blocklists), provides features like flexible customization, DNS statistics and parental control and is easily managed through a handy dashboard.
+<iframe width="560" height="315" class="youtube-video" src="https://www.youtube-nocookie.com/embed/ME3_Ms9LO8M" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
+
+In addition to the benefits of a public DNS server (such as traffic encryption and domain blocklists), Private AdGuard DNS provides features like flexible customization, DNS statistics, and parental control, and is easily managed through a handy dashboard.
 
 ## Why you need Private AdGuard DNS
 
@@ -50,6 +52,7 @@ Here is a simple comparison of features available in Public AdGuard DNS and Priv
 - Linux
 - Routers
 - Gaming consoles
+- Smart TVs
 
 :::
 
@@ -85,7 +88,7 @@ For times when pre-installed *Blocklists* with thousands of rules are not enough
 
 ### Statistics
 
-In "Statistics" tab you can see all the summarized statistics on DNS queries made by devices connected to your Private AdGuard  DNS. It shows the total number and geography of requests, the number of blocked requests, the list of companies the requests were addressed to, requests types and top requested domains.
+In the *Statistics* tab you can see all the summarized statistics on DNS queries made by devices connected to your Private AdGuard  DNS. It shows the total number and geography of requests, the number of blocked requests, the list of companies the requests were addressed to, requests types and top requested domains.
 
 ![Private AdGuard DNS dashboard statistics](https://cdn.adtidy.org/public/Adguard/Blog/private_adguard_dns/statistics.png)