A playlist can contain videos from many owners, so permission must be checked per item. Owning the playlist only means you arranged the links; it does not grant rights to copy every video inside it.
Audit the playlist first
Create a short inventory with the title, owner, duration, license, and desired use for each item. Remove private, paid, members-only, or unlicensed videos. For a course or team archive, obtain written permission from each relevant owner.
Decide whether offline playback is enough
YouTube Premium’s official offline feature may be the simplest choice for personal viewing in supported regions. If you need reusable files for authorized production work, ask the owner for source files or direct downloads.
Understand the web trial boundary
The current web trial handles one eligible URL and does not batch-download a playlist. It is limited to one use per account, 720p, 10 minutes, and 500 MB. A playlist URL should not be submitted with the expectation that every item will be saved.
Batch workflows are a candidate for the coming desktop product, but the final feature set is still being defined.
Design an organized output
Use a predictable filename such as 01-topic-creator.mp4, keep a spreadsheet or text manifest, and retain attribution. Numbering prevents the operating system from scrambling the intended order.
Estimate storage before starting
Multiply the average permitted file size by the number of items, then add at least 20 percent free space. If the collection is large, archive in smaller verified batches and keep an independent backup of the manifest.
Handle unavailable items honestly
Do not attempt to bypass access controls when a video is private, removed, or restricted. Mark it as unavailable in the manifest and contact the owner. A clear gap is better than an unauthorized or unsafe copy.