Bulk import is useful when the input already has structure: a YouTube playlist, a channel, an RSS feed or a prepared list of links.
Open the target NotebookLM notebook first. Choose the matching import mode, paste the URL or list, and start with a small batch. This makes it easier to see whether the source type is supported before reaching a notebook limit.
After import, inspect the final source list. A video may appear without useful text when no transcript is available. A private or restricted page may fail. A large playlist can exceed the remaining source capacity.
The result should show how many sources were imported and how many failed. A silent partial import is harder to correct than an explicit failure count.
NotebookBloom automates the repeated Add source steps. It does not remove NotebookLM's own source limits or guarantee that every external page exposes usable content.
Practical checklist
Use a public or non-sensitive notebook for the first test. Verify the output before deleting the intermediate file, and keep the product limitation visible.
Related guide: https://notebookbloom.com/blog/notebooklm-bulk-import-folders/?utm_source=devto&utm_medium=content&utm_campaign=ops14_bulk_import
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