Updates Instructions for On-Demand Gated Assets

Why is this change being made?

Unfortunately, the team who used to support Vimeo adds for our workshop recordings was impacted by layoffs and we can no longer obtain our recordings quickly enough to send in our workshop follow up emails. For now, we'll go back to uploading to Unfiltered for a more efficient process for workshops. Webcasts do not have as tight of a turnaround time, so we can still utilize the Vimeo request for those (or YouTube Unlisted if a quick turnaround is required).

Author Checklist

• Provided a concise title for this Merge Request (MR)
• Added a description to this MR explaining the reasons for the proposed change, per say why, not just what
  • Copy/paste the Slack conversation to document it for later, or upload screenshots. Verify that no confidential data is added, and the content is SAFE
• Assign reviewers for this MR to the correct Directly Responsible Individual/s (DRI)
  • If the DRI for the page/s being updated isn’t immediately clear, then assign it to one of the people listed in the Maintained by section on the page being edited
  • If your manager does not have merge rights, please ask someone to merge it AFTER it has been approved by your manager in #mr-buddies
  • The when to get approval handbook section explains the workflow in more detail
• If the changes affect team members, or warrant an announcement in another way, please consider posting an update in #whats-happening-at-gitlab linking to this MR
  • If this is a change that directly impacts the majority of global team members, it should be a candidate for #company-fyi. Please work with internal communications and check the handbook for examples.

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