Prebid.js: MediaTypes are not respected by multiple bidders

[dugwood]

Type of issue

Feature request

Description

Setting up mediatypes with something other than banner is really difficult: AppNexus and Teads (if not other) are answering with banner to a mediaTypes request with only video

Steps to reproduce

Ask for only mediaTypes=video, as shown here:
http://prebid.org/examples/video/outstream/outstream-no-adserver.html
=> answer doesn't take care of the video media type.

Test page

https://www.sortiraparis.com/prebid-test#debug-ads-for-skyboard-670168054&pbjs_debug=true
And look for the «Zone 22974»

Expected results

Only bid.mediaType = 'video' should be returned as we asked only for that:

Actual results

Zone 22974
   25 Enabling format
   26 Added div#unq_fmt_22974_3
   33 Available width: 624px
   33 Bidders: teads:v, appnexusAst:v    <= here the «v» stands for «video» only
  626 teads          banner (1x1)     : 0      (net)   Time: 175   <=  a 1x1 banner!!
  746 appnexusAst    banner (300x250) : 0      (net)   Time: 300   <= a 300x250 banner!!
 1155 No Prebid winner, fallback to house ads

banner is seen from time to time, along with wrong sizes (1x1 instead of the video size sent).

Platform details

Prebid.js: 1.28.0
Browser / OS: not relevant
node, npm: not relevant

Other information

These bids should be discarded. Although it would be great to be able to setup various mediaTypes depending on the bidder. For example I want AppNexus to serve video, but Teads to serve native, on the same adUnit.

[bretg]

@mkendall07 - perhaps a core change to enforce the media is desirable here?

[mkendall07]

seems reasonable to enforce mediaType at the core level since we can't know what any bidder will return.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[dugwood]

Should I submit a PR?