[extractors] Use new framework for existing embeds (#4307)

`Brightcove` is difficult to migrate because it's subclasses may depend
on the signature of the current functions. So it is left as-is for now

Note: Tests have not been migrated

yt_dlp/extractor/_extractors.py

@@ -446,7 +446,7 @@ from .dw import (
     DWIE,
     DWArticleIE,
 )
-from .eagleplatform import EaglePlatformIE
+from .eagleplatform import EaglePlatformIE, ClipYouEmbedIE
 from .ebaumsworld import EbaumsWorldIE
 from .echomsk import EchoMskIE
 from .egghead import (
@@ -1555,6 +1555,7 @@ from .shared import (
     SharedIE,
     VivoIE,
 )
+from .sharevideos import ShareVideosEmbedIE
 from .shemaroome import ShemarooMeIE
 from .showroomlive import ShowRoomLiveIE
 from .simplecast import (