YahooSSP added video support. (#3664)
YahooSSP added video support. (#3664)

Co-authored-by: oath-jac <c8d4484e0b2343ffcbd6613c4b4b67b21c500143@verizonmedia.com>
prebid/prebid.github.io,prebid/prebid.github.io,prebid/prebid.github.io