7 classes are annotated with FileEntityDealer in Media Migration 8

Audio in src/Plugin/media_migration/file_entity/Audio.php

Audio media migration plugin for local audio media.

Document in src/Plugin/media_migration/file_entity/Document.php

Document media migration plugin for local document media entities.

Fallback in src/Plugin/media_migration/file_entity/Fallback.php

Fallback plugin for unknown (custom) file entity types.

Image in src/Plugin/media_migration/file_entity/Image.php

Image media migration plugin for local image media entities.

Video in src/Plugin/media_migration/file_entity/Video.php

Video media migration plugin for local video media entities.

Vimeo in src/Plugin/media_migration/file_entity/Vimeo.php

Vimeo media migration plugin for Vimeo media entities.

Youtube in src/Plugin/media_migration/file_entity/Youtube.php

Youtube media migration plugin for YouTube media entities.