To add a video for Aleksandr Vasilyevich Aleksandrov / Sergej Mikhalkov / G. El-Reghistan / Russian National Hymn, just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for Aleksandr Vasilyevich Aleksandrov / Sergej Mikhalkov / G. El-Reghistan / Russian National Hymn