youtube: updated formulation

wiki/vpn.md

@@ -41,6 +41,9 @@ A proxy can be set up via [Docker](/wiki/docker.md) with the
 [WireGuard](https://www.wireguard.com/) is a free and open-source software that
 implements encrypted VPNs.
 It was designed to be especially fast and secure.
+This section including its subsections - especially the [usage](#usage-wg) is
+based on an extensive guide on WireGuard by
+[DigitalOcean](https://www.digitalocean.com/community/tutorials/how-to-set-up-wireguard-on-ubuntu-20-04#step-9-connecting-the-wireguard-peer-to-the-tunnel).
 
 ### Setup (WG)
 
@@ -58,7 +61,7 @@ accesses the server.
 WireGuard clients can be found for many devices.
 For Android for example there is
 [Wireguard for Android in the F-Droid store](https://f-droid.org/de/packages/com.wireguard.android/).
-For most linux distributions there is a package called `wireguard`.
+For most linux distributions there is a package called `wireguard-tools`.
 
 ### Usage (WG)
 
@@ -78,3 +81,20 @@ wg-quick down wg0
 When using multiple `.conf` files the number behind `wg` can be incremented.
 When starting and stopping wireguard with `wg-quick` the corresponding number
 should be used.
+Alternatively also other names not including `wg` can be used.
+The term `wg0` the incremented version of it has to be changed accordingly then.
+
+### Troubleshooting (WG)
+
+This section addresses various errors and ways how to troubleshoot them.
+
+#### Unknown Device Type / Protocol Not Supported
+
+Especially when running `wg-quick up wg0` this error can appear.
+The most probable source of this error is that the version of the package
+`linux` doesn't match with the version of the [wireguard package](#client-wg) or
+the system has been updated and the system wasn't restarted causing the same
+problem.
+To fix this `linux` can be reinstalled but a full update of the system is
+recommended.
+Because it changes the kernel the system needs to be restarted afterwards.

wiki/youtube.md

@@ -15,7 +15,9 @@ available in the [F-Droid Appstore](/wiki/android/f-droid.md).
 YouTube videos can be downloaded.
 Some [alternative frontends](#alternative-frontends) feature downloading of
 videos or making them offline available.
-As a command line utility [yt-dl](https://github.com/ytdl-org/youtube-dl) or its
+As a command line utility [yt-dl](https://github.com/ytdl-org/youtube-dl) can be
-fork [yt-dlp](https://github.com/yt-dlp/yt-dlp) can be used.
+used.
+Since yt-dl is stagnant its fork [yt-dlp](https://github.com/yt-dlp/yt-dlp) is
+recommended.
 [MeTube](/wiki/metube.md) is a self-hostable web user interface for
 [yt-dlp](https://github.com/yt-dlp/yt-dlp).