Upload videos to exercises as a trainer

[ChrisMcHale]

As a Trainer I should be able to upload example videos to workouts to a personal library that demonstrate form and technique and be able to share them to individual users on the platform as embedded videos.

Many gym users benefit from example videos on how to perform exercises, some users need specific guidance on modifications to an exercise due to health/mobility issues.

Remote gym users who work out from home can not get in-person demonstrations. Being able to upload demonstration videos from a trainer would be invaluable.