documenting main pages

docs/Home.md

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 # Tube Archivist Wiki
-*Documentation of user functionality*  
 
 **WIP**: This is work in progress!
 
+Welcome to the official Tube Archivist Wiki. This is an up-to-date documentation of user functionality.
+
 Table of contents:
 * [Main](Main): Tube Archivist landing page
 * [Channels](Channels): Browse your channels, handle subscriptions
 * [Downloads](Downloads): Scanning subscriptions, handle download queue
 * [Settings](Settings): All the configuration options
+
+## Getting Started
+1. [Subscribe](Channels#channels-overview) to some of your favourite YouTube channels.
+2. [Scan](Downloads#rescan-subscriptions) subscriptions to add the latest videos to the download queue.
+3. [Add](Downloads#add-to-download-queue) additional videos, channels or playlist - ignore the ones you don't want to download.
+4. [Download](Downloads#download-queue) and let **Tube Archivist** do it's thing.
+5. Sit back and enjoy your archived and indexed collection!
+
+## General Navigation
+* Clicking on the channel name or the channel icon brings you to the dedicated channel page to show videos from to that channel.
+* Clicking on a video title brings you to the dedicated video page and shows additional details.
+* Clicking on a video thumbnail opens the video player and starts streaming the selected video.
+* Hover over the playing video to show additional control options.
+
+Videos you *haven't* marked as **watched** show a empty checkbox, click on it to mark it as watched:   
+<img src="../tubearchivist/static/img/icon-unseen.svg?raw=true" alt="unseen icon" width="20px" style="filter:invert(50%) sepia(9%) saturate(2940%) hue-rotate(122deg) brightness(94%) contrast(90%);">  
+Videos you *have* marked as watched, will show as a filled checkbox:  
+<img src="../tubearchivist/static/img/icon-seen.svg?raw=true" alt="seen icon" width="20px" style="filter:invert(50%) sepia(9%) saturate(2940%) hue-rotate(122deg) brightness(94%) contrast(90%);">