Video lectures given in teams classes are automatically recorded in the "Recordings" folders of Teams and the SharePoint of the class. It is not a very good idea to leave them as they are by two reasons. First, they will be automatically deleted in 60 days if the educator does not prevent this outcome manually. Second, they should be edited to remove unnecessary sections. New videos should be kept in document libraries of the SharePoint sites as it is shown in the picture above. Notice, that I added the "Thumbnail" column of the "Image" type and unhide the column with the file's sizes. The first column, as result, includes first picturtes from the videos present in this library.