There are many applications (online and offline) that can help you create VTT files more easily than doing it by hand. The typical output is a file that you could also create manually using Notepad--for example:

WEBVTT
Kind: captions
Source: Manually by Pat Smith
Source Version: 7/5/2021

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After completing this training program,

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you should know how to: 

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Properly handle food from the moment it enters your store

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till it leaves in when a customer purchases it;

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Minimize the risk of food contamination 

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foodborne illness as you move through your daily tasks;

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Maintain your personal hygiene on the job 

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so you don’t contaminate food; 

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and, clean and sanitize equipment and surfaces in your store 

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so food products avoid contamination.

Leave the first line as-is. Adjust the value on the second line to be accurate (captions, subtitles, descriptions, or chapters). Adjust the values on the third and four lines as appropriate. Leave the fifth line empty.

Below the fifth line, just include two lines for every item to display, followed by an empty line. The first line is the Start --> Stop times during which the text (on the next line) is applicable. The times are entered in HH:MM:SS.sss format. Note that there can be gaps between one item's Stop time and the next item's Start time.

Save the file using the extension .vtt so that it will show up when selecting a VTT file to upload.

1. Click the + near the top-right of the Manage Video Text Tracks admin page.
2. Select the Kind of VTT file you're adding,
3. Select the Language of the text that's in the file,
4. Enter the Label to be displayed to the viewer in the video player. Typically this should just be the language text that the viewer would understand (e.g., "English" not "English (EN)" or "English Captions").
5. Select the VTT File to upload and and wait for the upload to reach 100%.
6. Click Save to commit your changes, or Cancel to exit without adding a new VTT,

Note that no "rules" are enforced when adding/editing text tracks, which means it's possible to add four English Captions and select the same file evey time...but that would not result in an ideal experience for your viewer. The Overview section includes several recommendations.

After adding/editing video text tracks, an automated process will see that changes are happening on the specific video. It will continue monitoring the video until it sees no more changes have been made for about 15 minutes, and then it will forward all the changes to the video service provider to process. Within an hour the changes should start appearing as options everywhere that the video appears (including the Live environment without republishing anything).

1. In the list of current Video Text Tracks, click Edit.
2. Adjust Kind/Language/Label as needed.
3. You do not need to upload a replacement VTT file, unless the content of that file has been changed. If it has been changed, select the VTT File to upload and and wait for the upload to reach 100%.
4. Click Save to commit your changes, or Cancel to exit without saving any changes,

After adding/editing video text tracks, an automated process will see that changes are happening on the specific video. It will continue monitoring the video until it sees no more changes have been made for about 15 minutes, and then it will forward all the changes to the video service provider to process. Within an hour the changes should start appearing as options everywhere that the video appears (including the Live environment without republishing anything).

1. In the list of current Video Text Tracks, click the Download icon. NOTE: You should always keep a local copy of all your original source files.

1. In the list of current Video Text Tracks, click the Delete icon.
2. Click Yes to confirm the deletion, or No to exit without changing anything.