Ever wanted to run a Unity Coroutine from game code thats not in a MonoBehaviour (for example, a static manager class). Now you can friends!! this class automates creating a dummy game object to run your coroutine and cleans itself up automagically when the routine has finished

StaticCoroutineRunner.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class CoroutineRunner : MonoBehaviour
{
    public static void RunCoroutine(IEnumerator coroutine)
    {
        var go = new GameObject("runner");
        DontDestroyOnLoad(go);

        var runner = go.AddComponent<CoroutineRunner>();

        runner.StartCoroutine(runner.MonitorRunning(coroutine));
    }

    IEnumerator MonitorRunning(IEnumerator coroutine)
    {
        while (coroutine.MoveNext())
        {
            yield return coroutine.Current;
        }

        Destroy(gameObject);
    }
}

Hey, it's kind of self-advertising, however check this out, please:
https://github.com/Feacur/UnityEngineStudy/blob/master/Assets/Plugins/Custom/Singleton/AutoInstanceMonoBehaviour.cs
You can use this auto instanced objects for static coroutines just as well.

I build stuff there from time to time, and you might find something useful.
Also thank you for these gists, I've found couple of useful scripts here, @LotteMakesStuff =)