Update README.md

provide instructions on how to run the script,
current goals, and a short description

README.md

@@ -1,2 +1,50 @@
 # ythdd
+*Archive videos while you watch them.*
 
+**ythdd** is tool which can help you create a multimedia archive by downloading videos and their metadata while you watch them.
+It does so by acting as an intermediary between you and YouTube, forwarding your requests while also saving them to a hard drive, hence the name.
+
+## Goals
+**Current goal of the project**: provide support for [Invidious](https://github.com/iv-org/invidious) API calls through the Invidious translation layer (ythdd_inv_tl.py).
+
+## Running ythdd:
+- First, download project files or clone the repository with git:
+```
+git clone https://gitea.7o7.cx/sherl/ythdd.git
+```
+
+- Navigate into the directory with project files:
+```
+cd ythdd
+```
+
+- Create a virtual enviroment:
+```
+python -m venv .venv
+```
+Above will create a hidden directory called *.venv*.
+
+- To activate the virtual enviroment use:
+    - on Linux:
+    ```
+    source .venv/bin/activate
+    ```
+    - on Windows (cmd):
+    ```
+    .venv\Scripts\activate
+    ```
+
+- Install required packages into the newly created virtual environment:
+```
+pip install -r requirements.txt
+```
+
+- Run the script:
+    - continuously without interrupts:
+    ```
+    python ythdd.py
+    ```
+    - with automatic reloading (code will be reloaded after a change to the codebase)
+    ```
+    flask --app ythdd run --debug
+    ```