consumable Bid Adapter: add video support

[jpiros]

Type of change

• [ ] Bugfix
• [x] Feature
• [ ] New bidder adapter
• [ ] Code style update (formatting, local variables)
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] CI related changes
• [x] Does this change affect user-facing APIs or examples documented on http://prebid.org?
• [ ] Other

Description of change

Adds support for video

Other information

https://github.com/prebid/prebid.github.io/pull/3946