The annotation features inside the Motion Amplification® software allow you to embed text messages in the final exported MP4. You can use these features to document amplitude measurements.
Version 2.3 UPDATE
Use Motion Studio to add dynamic graphs and headings to your videos. Version 2.3 also allows you to embed Spectrum, Waveform, Spectrum & Waveform, and Orbits as annotation before the MP4 is created.
See the videos at these links for examples of the two different behaviors: