Bugfix: rename the video name when test device count is 1

[zhou9584]

Description

Linked GitHub issue ID:

Pull Request Checklist

• Tests for the changes have been added (for bug fixes / features)
• Code compiles correctly with all tests are passed.
• I've read the contributing guide and followed the recommended practices.
• Wikis or README have been reviewed and added / updated if needed (for bug fixes / features)

Does this introduce a breaking change?

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• Yes
• No

How you tested it

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Please check the type of change your PR introduces:

• Bugfix
• Feature
• Technical design
• Build related changes
• Refactoring (no functional changes, no api changes)
• Code style update (formatting, renaming) or Documentation content changes
• Other (please describe):

Feature UI screenshots or Technical design diagrams

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