FIX dev branch error with loading youtube links that have no params (#570)

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### Description
This is a quick and dirty fix to youtube links not having parameters

**This fixes a branch issue**

#### Type of change

- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] This change requires a documentation update

### Checklist:

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my own code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have made corresponding changes to the documentation
- [ ] My changes generate no new warnings

### AI disclosure:

- [ ] Partially AI assisted (clarify which code was AI assisted and
briefly explain what it does).
- [ ] Fully AI generated (explain what all the generated code does in
moderate detail).
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I have asked God for the solution

Author: dozro

src/app/components/url-preview/ClientPreview.tsx

@@ -166,7 +166,7 @@ function parseYoutubeLink(url: string): YoutubeLink | null {
   if (url.includes('youtu.be')) {
     const split = path.split('?');
     [videoId] = split;
-    params = split[1].split('&');
+    params = split[1]?.split('&');
   } else {
     params = path.split('?')[1].split('&');
     videoId = params.find((s) => s.startsWith('v='), params)?.split('v=')[1];
@@ -175,8 +175,10 @@ function parseYoutubeLink(url: string): YoutubeLink | null {
   if (!videoId) return null;
 
   // playlist is not used for the embed, it can be appended as is
-  const playlist = params.find((s) => s.startsWith('list='), params);
-  const timestamp = params.find((s) => s.startsWith('t='), params)?.split('t=')[1];
+  const playlist = params ? params.find((s) => s.startsWith('list='), params) : undefined;
+  const timestamp = params
+    ? params.find((s) => s.startsWith('t='), params)?.split('t=')[1]
+    : undefined;
 
   return {
     videoId,