Great news, there is a now a Media page in Activity Messenger!
The Media page holds images you've uploaded, as well as any Youtube/Vimeo video you have published. You can now easily attach them to emails and SMS you send. Gone are the days where you had to upload the same picture multiple times.
Connect your Youtube channel to make available all the videos you have published. Then, to send a Youtube video to a list of people, just click on the Media button to choose the video. Recipients will get a preview of the video and a link to open their Youtube app. Perfect for promotional videos.