chore(deps): update dependency google-cloud-video-transcoder to v0.5.1 (#6726)
chore(deps): update dependency google-cloud-video-transcoder to v0.5.1 (#6726)

Co-authored-by: Leah E. Cole <a5082685b0b89abc4f85079ca3a58177707489f8@users.noreply.github.com>
GoogleCloudPlatform/python-docs-samples,GoogleCloudPlatform/python-docs-samples,GoogleCloudPlatform/python-docs-samples,GoogleCloudPlatform/python-docs-samples