Update video_classification.ipynb

[Rajasimhareddybolla]

trafficstars

What does this PR do?

Align Colab notebook with official Hugging Face documentation for video classification

• Identified missing code sections in transformers_doc/en/tensorflow/video_classification.ipynb that are correctly present in the official Hugging Face documentation.

• Updated the Colab notebook to include these missing code snippets, ensuring consistency between the notebook and the Hugging Face Video Classification Docs.

• This update fixes discrepancies that could lead to confusion or errors for users following the notebook in Colab, enhancing the reliability of the provided resources.

• Verified the changes to ensure the notebook runs as expected with the corrected code.

Fixes # (issue)

Who can review?

Feel free to tag members/contributors who may be interested in your PR.