Use One Drive for Business storage as repositry
Allow a One Drive for Business account to server as the repository for all videos as over time a video library can swell well beyond SharePoint online storage limits
It would be pretty awesome if any video placed in OneDrive for Business was automatically uploaded to Office 365 Video/Azure Media Encoder. Of course controls would be needed to manage video sharing and organization of videos in folders or categories.
Compromise: see Feedback ""Video storage selection"