Trying to load unavailable or restricted videos causes crash

[Phixyn]

Description

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After trying to load a private, deleted or restricted video into the player, the app is no longer usable. Users are no longer able to load new videos.

Steps to reproduce

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1. Load the page
2. Enter the ID or URL of an unavailable or restricted YouTube video and click Update
3. Enter a valid ID or URL for a video and click Update

Expected behavior

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New videos should be loaded and played.

Screenshots

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Desktop

If using the website on desktop, please complete the following information.

• OS [e.g. Windows]: -
• Browser [e.g. Firefox, Chrome]: Any
• Browser version [e.g. 22]: Latest

Mobile

If using the website on mobile, please complete the following information.

• Device [e.g. Google Pixel]: -
• OS: [e.g. Android 10]: -
• Browser [e.g. Chrome]: -
• Browser version [e.g. 22]: -

Additional information

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Related to #121