Coincidentally, we just happen to have been working on reports recently... 9.0.238 is up now on the alpha channel and includes the ability to search by attached event date. It's under the "Time" filter, which previously had only "Modified" but now includes "Created" and "Event". Selecting "Event" will find any thought that has an event that intersects with the specified date range.
Supported videos include:
Please paste your code into the box below: