DEV: Remove lazy-yt and replace with lazy-videos (#20722)

- Refactors the old plugin to remove jquery usage
- Adds support for Vimeo videos (default on) and Tiktok (experimental and default off)

plugins/discourse-lazy-videos/test/javascripts/components/lazy-video-test.js

@@ -0,0 +1,49 @@
+import { setupRenderingTest } from "discourse/tests/helpers/component-test";
+import hbs from "htmlbars-inline-precompile";
+import { module, test } from "qunit";
+import { click, render } from "@ember/test-helpers";
+
+module("Discourse Lazy Videos | Component | lazy-video", function (hooks) {
+  setupRenderingTest(hooks);
+
+  this.attributes = {
+    url: "https://www.youtube.com/watch?v=kPRA0W1kECg",
+    thumbnail: "thumbnail.jpeg",
+    title: "15 Sorting Algorithms in 6 Minutes",
+    providerName: "youtube",
+    id: "kPRA0W1kECg",
+  };
+
+  test("displays the correct video title", async function (assert) {
+    await render(hbs`<LazyVideo @videoAttributes={{this.attributes}} />`);
+
+    assert.dom(".title-link").hasText(this.attributes.title);
+  });
+
+  test("displays the correct provider icon", async function (assert) {
+    await render(hbs`<LazyVideo @videoAttributes={{this.attributes}} />`);
+
+    assert.dom(".icon.youtube-icon").exists();
+  });
+
+  test("loads the iframe when clicked", async function (assert) {
+    await render(hbs`<LazyVideo @videoAttributes={{this.attributes}}/>`);
+    assert.dom(".lazy-video-container.video-loaded").doesNotExist();
+
+    await click(".video-thumbnail.youtube");
+    assert.dom(".lazy-video-container.video-loaded iframe").exists();
+  });
+
+  test("accepts an optional onLoadedVideo callback function", async function (assert) {
+    this.set("foo", 1);
+    this.set("onLoadedVideo", () => this.set("foo", 2));
+
+    await render(
+      hbs`<LazyVideo @videoAttributes={{this.attributes}} @onLoadedVideo={{this.onLoadedVideo}} />`
+    );
+    assert.strictEqual(this.foo, 1);
+
+    await click(".video-thumbnail.youtube");
+    assert.strictEqual(this.foo, 2);
+  });
+});