fix: Removed broken Rally links and fixed Youtube links

[mwermuth]

Description

Fixes #9063

Removed three broken Rally links that I wasn't sure where they linked to (and as we still have quite a few it didn't feel worth it to investigate further). For the other three Youtube Links I edited and replaced the old link

Demo

Testing scenarios

[Please list all the testing scenarios a reviewer has to check before approving the PR]

• Click on the following All Caught Up Links - a Youtube video should show.
  • Don't Stop Believin'
  • On With the Show
  • Right Here, Right Now

Final checklist

• I checked the code review guidelines
• I have added Metrics Representative as reviewer(s) if my PR invovles metrics/data/analytics related changes
• I have performed a self-review of my code, the same way I'd do it for any other team member
• I have tested all cases I listed in the testing scenarios and I haven't found any issues or regressions
• Whenever I took a non-obvious choice I added a comment explaining why I did it this way
• I added the label One Review Required if the PR introduces only minor changes, does not contain any architectural changes or does not introduce any new patterns and I think one review is sufficient'
• PR title is human readable and could be used in changelog