The video gives an introduction to the shared database feature in UGENE.
The database can be used e.g. by colleagues in a lab to share and synchronize different bioinformatics objects (sequences, annotations, multiple alignments, phylogenetic trees, NGS assemlies, etc.)
When NGS assemblies are shared, only required part of them is loaded to a client computer. That saves time of the researcher and the hard disk space on the client's computer.
The video also mentions the UGENE public storage feature. The storage is opened for read-only access and contains commonly used data (DNA genomes and plasmids).
See also: http://ugene.unipro.ru/shared-db.html