feat: include playlist link in 'watch on youtube' button

src/components/WatchVideo.vue

@@ -136,7 +136,7 @@
                             <i class="i-fa6-solid:share mx-1.5" />
                         </button>
                         <!-- YouTube -->
-                        <WatchOnButton :link="`https://youtu.be/${getVideoId()}?t=${Math.round(currentTime)}`" />
+                        <WatchOnButton :link="youtubeVideoHref" />
                         <!-- Odysee -->
                         <WatchOnButton
                             v-if="video.lbryId"
@@ -363,6 +363,11 @@ export default {
         purifiedDescription() {
             return purifyHTML(this.video.description);
         },
+        youtubeVideoHref() {
+            let link = `https://youtu.be/${this.getVideoId()}?t=${Math.round(this.currentTime)}`;
+            if (this.playlistId) link += `&list=${this.playlistId}`;
+            return link;
+        },
     },
     mounted() {
         // check screen size