Use groups and channels to organize and permission your videos in Microsoft Stream. A video can be in any number of groups and channels at the same time.
Getting videos into groups and channels is easy with the Add to group/channel option.
If a video is a companywide video you can add it to any of your groups/channels even if aren't an owner of the video.
If you are the owner of a video you can add your video to any groups/channels you can contribute to.
You can also add videos to group/channels in the following flows:
Overview of groups & channels
Permissions and privacy