If you create free videos on the PNP website, they are typically available for a limited time. The exact duration may vary, but it is usually around 30 days. After this period, the free videos may no longer be accessible.
If you have a Magic Pass subscription, the personalized videos you create will have an extended availability. Typically, with the Magic Pass, your videos will be accessible until the end of the following year's holiday season. For example, if you create videos during the 2022 holiday season, they will likely be available until the end of the 2023 holiday season.
Product lifecycle rules are described HERE.