You can definitely import videos to SeriousMD but that will rely on the internet speed to complete the upload.
To upload a video, just pick the video from where you saved it into the Files app on your iPad or iPhone.
This is how the iOS 11 system handles files so we're only limited to the Files up at this time until they release the next iOS version.
Then inside SeriousMD, you can add a new note for the patient, pick the "File" note type and attach the video. That will then save inside SeriousMD.
If you are uploading from your computer via seriousmd.com/doctor,you can just pick the video directly and upload it.