🎁 Add video embed to OER Work Type

[ShanaLMoore]

This PR manually adds video embed to oer model, form files, and show partial.

It also includes translations.

Issue:

• Embed codes for media (see Atla instance) #911

OER show page (OER does not use the base/show.html.erb like the other model types)

Vimeo example: https://player.vimeo.com/video/467264493?h=b089de0eab

[ShanaLMoore]

UPDATE:

I'm noticing that editing the other work types is presenting the same behavior. For the sake of time I may undo the module work and proceed by putting the video embed code directly onto the models and form files, like done in this PR.