Do component content entities have view modes?
No. Component content entities do not have view modes.
Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
No. Component content entities do not have view modes.
Yes, this is possible by creating a custom element.
The Youtube video embed is responsive so it should expand to the width of its parent. If you do need to set a width you can apply the Width CSS property through the Style Builder.
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