class DownloadButton
extends LitElement
import { DownloadButton } from "https://deno.land/x/yt_download@1.5/ui-elements/download-button.js";
x/yt_download/ui-elements/download-button.js>DownloadButton
import { DownloadButton } from "https://deno.land/x/yt_download@1.5/ui-elements/download-button.js";