Pocket Premium: Permanent Library – Pocket Support

What is not included in my Permanent Library?Pocket’s Permanent Library is unable to create copies of the following content: Video and audio files, and other embedded mediaDynamic web content, powered by JavaScript or FlashPDF files or other documentsContent within iframes Content that is available behind paywalls or require an account to accessAdditionally, for accounts with very large numbers of items saved, Pocket will create permanent copies of the most recent 30,000 items that are present in the account at the time of upgrade. However, as more items are saved, no permanent copies will be removed.

Source: Pocket Premium: Permanent Library – Pocket Support