Do Uploaded Youtube Videos Keep Orginal Metadata
Always Acquire Original Files If You Tin can
Whether y'all are acquiring video directly from a camera, mobile phone, difficult bulldoze, or downloading from the web, always collect the original file (i.e. an exact re-create) when possible. Besides being the accurate object, the original file contains important metadata about the video source, such as the date recorded or geographic location. This information is often lost if the file is altered or transcoded.
In situations where the original file is not bachelor (eastward.g. when downloading from YouTube), your only option may exist to download a transcoded derivative. If y'all have a choice between not-original files, select one that was derived from the original (i.due east. as opposed to a derivative of a derivative). Secondarily, select the highest quality copy that is bachelor in a widely used and current format.
Effort This: Basic
WAIL (Spider web Archiving Integration Layer) is a one-click tool for acquiring web pages, including ones with video.
Try This: ADVANCED
YouTube-dl is a control-line tool to downloading videos from video sharing sites.
Get the Metadata
Along with the video, make sure you learn any metadata or documentation that comes with it. Metadata can be embedded in the video file, delivered with the video files in another format (e.1000. a text document), sent or displayed separately from the video file (e.g. in an email, on a YouTube page). Metadata can also be communicated to yous orally or in person. Record this information in some form, such as a text document, spreadsheet, or database.
Effort This: Basic
TubeKit is a YouTube crawler that allows you to excerpt YouTube video information (author, keywords, genre, number of views, ratings, comments, etc.), collect text comments for YouTube videos, and extract a YouTube users' profile data.
Try This: Advanced
YouTube Information API allows you to obtain detailed metadata about a video, including metadata from the original video file (which itself is not available).
Attempt This: BASIC
MediaInfo ($0.99, GUI version) displays metadata embedded in video and audio files.
Endeavor This: Advanced
The free version of MediaInfo displays metadata embedded in video and audio files in the command-line.
Remember that not all metadata is correct, complete, or reliable. Fifty-fifty metadata embedded in a file can be incorrect (due east.g. if the photographic camera is set to the wrong engagement and time). Try to fill in missing information by contacting the creator or source, or through research. When acquiring from untrusted or unknown sources, take steps to verify data, such every bit past examining the sources or corroborating the videos with other known data. You lot can still acquire unverified videos, but take note what information is missing or may be unreliable.
Check Your Files
Later on y'all accept copied, moved, or downloaded the video and whatsoever metadata or documentation, check to make sure you take acquired the files completely and intact:
Simple method
Effort to play back or open the files. If collecting original files, verify that the number of files and file sizes friction match the source.
More than foolproof method
If collecting original files, check hashes (i.e. checksums) of caused files against hashes computed on the source. See "Keeping Files Intact (and Proving It)" for more than information on how to do this.
Endeavor This: Bones
Karen's Hasher is a Windows GUI tool for computing and verifying hashes.
Try This: Advanced
MD5 is a free command-line utility for computing MD5 hashes (aka checksums).
Endeavour This: Advanced
md5deep and hashdeep are a costless command-line tools for calculating and comparing multiple checksums for entire directories of files.
Try This: Advanced
sha1sum is a gratuitous command-line utility for computing and checking SHA-one checksums that is part of the GNU Core Utilities.
Video as Bear witness Tip
Compute hashes of your videos when yous acquire them, and check confronting hashes from the source if bachelor. Every bit part of chain of custody, keep a record of the hashes to demonstrate that your files have not been tampered with or contradistinct over time. Provide the hash value when y'all share the video with others, and then that they tin verify that they received the video intact.
Exercise Not Re-Name Raw Videos Files
There is no need to rename the caused video files, unless the filename uses "illegal" characters (due east.m. ? [ ] / \ = + < > ; : " , | *), is excessively long, or contains spaces. If your video file still has the original filename from the photographic camera, y'all should not rename the file. The original filename is of import for retaining the original social club or sequence of raw video files, and is sometimes even essential for the full functionality of the video (e.g. AVCHD format). Run across the "Organize" section in the workflow for more data on naming files.
Maintain Concatenation of Custody
To maintain an unbroken chain of custody, yous need to document your acquisition. You tin create a registry or log of acquisitions to notation the time and date that videos were added to your collection. This footstep is often integrated and automated in cataloging and media management systems. You can also save documents such as submission forms, emails, download/transfer logs that bespeak when yous gained custody of a video.
Video as Show Tip
Maintaining an unbroken chain of custody is peculiarly important for evidentiary materials.
Takeaways
- Decide what you lot volition—and will not—collect and save; create a choice policy based on your goals and needs.
- Acquire unaltered original files whenever possible.
- Acquire all bachelor metadata and related documentation almost your videos.
- Check your acquired files to make sure you accept copied or downloaded them completely and correctly.
- Exercise not rename video files if they accept their original photographic camera-given filenames.
- Maintain the concatenation of custody by documenting the source, fourth dimension, date, and location of your acquisition.
- For edited videos, acquire a high-quality master whenever possible.
- For edited videos, larn production elements like projection files and graphics.
Key Concept: Option Policy
A selection policy provides clarity on what yous will acquire and what you will non.
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Key Concept: Actuality
Maintain the authenticity of a video when you lot acquire it by collecting the intact original file(s) and the metadata that comes with it.
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Key Concept: Chain of Custody
Your acquisition forms a role of a video's chain of custody.
Certificate your acquisition, so that an unbroken chain can be traced all the style back to the source.
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Cardinal Concept: Completeness
Be sure that yous acquire all of the files needed to create a consummate record, every bit defined by the purpose or requirements of your collection.
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Primal Concept: Original Social club
You may or may not receive video files in the order in which they were originally created, only yous should restore the original order subsequently yous acquire them.
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Key Concept: Integrity
Ensure that no loss, tampering, or file corruption occurs during the process of acquisition.
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Key Concept: Original File
E'er acquire an exact copy of the file created by the photographic camera with no alterations to content or technical specifications, unless doing so is impossible.
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Key Concept: Metadata
Metadata may be embedded within a video file, or information technology may exist a separate document. It is every bit important to acquire a video'south metadata as it is to larn the video itself.
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The Archiving Workflow
Source: https://archiving.witness.org/archive-guide/acquire/acquiring-raw-video-and-metadata/
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