Yes, but just remember that most modern smartphones and tablets will record video at a quality that creates a large file.  Even a 10 second file may take up 20Mb or more. 

For large videos, services generally upload the videos to a specialised video platform like YouTube and link to the videos into the relevant narrative.

Links to YouTube can be added to the Narrative of Observations, Experiences, Journals and Reflection of Learning in Observations and Journals. Just click on the “add link” icon:

You may want to set the privacy setting on the video in YouTube to “unlisted” to ensure it is not visible to everyone.