This is basic thing in SharePoint 2013. We can enable videos by activating an in-built feature in Site collection level. To get video support in SharePoint 2013, we have to activate the Video and Media feature in Site Collection level. To do that,
Navigate to Site Settings and select Site Collection features in Site Collection Administration section.
Check for “Video and Rich Media” feature and activate that feature.
By activating the feature we can see “Assets Library” to add rich media assets, like image, audio and video files etc... to Site collection.