Problem
Invalid characters in the title prevent the intended title string from being accepted by YouTube.
Solution
Root Cause / Diagnostic:
Using invalid characters (such as angle brackets `<>`, certain non-standard unicode symbols, or control characters) in video titles triggers YouTube API validation errors that prevent metadata from saving.
Actionable Step-by-Step Fix:
1. Remove Prohibited Special Characters: Strip angle brackets (`<`, `>`), emoticons, and non-standard unicode symbols from the title string.
2. Use Standard Title Separators: Restrict punctuation to clean, standard separators such as pipes (`|`), colons (`:`), or hyphens (`-`).
3. Verify Successful Save in Studio: Save the cleaned title in YouTube Studio and confirm that the blue 'Saved' confirmation banner appears without errors.
Pro Creator Tip:
Stick to standard alphanumeric characters and simple separators (| or -) in titles; exotic unicode symbols and angle brackets frequently trigger backend API validation errors.
Using invalid characters (such as angle brackets `<>`, certain non-standard unicode symbols, or control characters) in video titles triggers YouTube API validation errors that prevent metadata from saving.
Actionable Step-by-Step Fix:
1. Remove Prohibited Special Characters: Strip angle brackets (`<`, `>`), emoticons, and non-standard unicode symbols from the title string.
2. Use Standard Title Separators: Restrict punctuation to clean, standard separators such as pipes (`|`), colons (`:`), or hyphens (`-`).
3. Verify Successful Save in Studio: Save the cleaned title in YouTube Studio and confirm that the blue 'Saved' confirmation banner appears without errors.
Pro Creator Tip:
Stick to standard alphanumeric characters and simple separators (| or -) in titles; exotic unicode symbols and angle brackets frequently trigger backend API validation errors.