STHS School Sony

Gard recently uploaded his STHS Class of 1969 2014 Reunion video to YouTube.

You can see it here:

http://www.users.on.net/~sdgard/STHS/PhotoAlbums/2014Reunion.html

Shortly after this, the video received a copyright claim notice. About the music.
Gard did not steal the music. It was all created by himself, variations on the theme of 'Men of Harlech', an ancient march tune dating from at least 1408, which we know as our school song. 'Men of Harlech' has been in the public domain for centuries.

The digital analysis software used by YouTube to detect copyright violations is efficient. Upload a video of your daughter's wedding with 'Going to the Chapel of Love' by the Dixie Cups on the soundtrack, and you'll receive a copyright violation notice, literally in minutes.

Gard's music was oblique, he being a modern composer and all, but YouTube's software was able to detect the 'Men of Harlech' melody amid the harmonic undergrowth, and he received a copyright violation notice. It seems Sony now owns 'Men of Harlech'.

Gard does not have to delete the video, but he is not permitted to 'monetize' (horrid word) it.

The problems this must create...

Does STHS now have to pay a fee each time they sing the school song at assemblies? Or only at public performances like Speech Nights? Or have they obtained a licence for it to be sung only in school hours, but not on weekends or public holidays? And never by paid performers? Is the school band allowed to play it? What about recording The School Song for the K-Tel Album 'Golden Oldies of Tech, Latin Style?'