Metadata manager shows local trailers missing

[djlf 40]

Even though local trailers are in each movie folder some movies in metadata manager are showing the symbol

for local trailer missing?  I cant find a reason why this might be happening. Using youtube trailer plugin.

Any ideas as to why this is happening?

[Happy2Play 9780]

How are they named?

[djlf 40]

_{movie name-trailer.   cant for the life of me figure out why they are not been recognized.}