Coverage. Video with custom service

.
@[custom](video-id-abc)
.
<div class="block-embed block-embed-service-custom"><iframe type="text/html" src="https://example.com/embed/video-id-abc/123" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe></div>
.

.
@[youtube](video-id-abc)
.
<div class="block-embed block-embed-service-youtube"><iframe type="text/html" src="https://example.com/embed/video-id-abc/42" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe></div>
.


Coverage. Base services still present

.
@[vimeo](119932781)
.
<div class="block-embed block-embed-service-vimeo"><iframe type="text/html" src="//player.vimeo.com/video/119932781" frameborder="0" width="500" height="281" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe></div>
.