Remove a large video file (Zowe v2)

[ifakhrutdinov]

Proposed changes

This PR removes a large (~100MB) video file which was added for educational purposes, but would probably better belong on a proper streaming platform.

Type of change

Please delete options that are not relevant.

• [x] Chore, repository cleanup, updates the dependencies.

PR Checklist

Please delete options that are not relevant.

• [x] If the changes in this PR are meant for the next release / mainline, this PR targets the "staging" branch.
• [x] My code follows the style guidelines of this project (see: Contributing guideline)

[ifakhrutdinov]

The changelog file hasn't been updated on purpose because I don't think such a change belongs there.