LibreTube/app/src/main/res/drawable/ic_done.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="24dp"
    android:height="24dp"
    android:tint="?attr/colorControlNormal"
    android:viewportWidth="24"
    android:viewportHeight="24">
    <path
        android:fillColor="@android:color/white"
        android:pathData="M20.13,5.41l-1.41,-1.41l-9.19,9.19l-4.25,-4.24l-1.41,1.41l5.66,5.66z" />
    <path
        android:fillColor="@android:color/white"
        android:pathData="M5,18h14v2h-14z" />
</vector>