Update ix.md (#4842)

Added recommended sizes for Index's outstream video and added new userIDs: 33acrossId, nonID

dev-docs/bidders/ix.md

@@ -5,7 +5,7 @@ description: Prebid Index Exchange Bidder Adapter
 biddercode: ix
 pbjs: true
 pbs: false
-userIds: identityLink, netId, fabrickId, zeotapIdPlus, uid2, unifiedId, id5Id, lotamePanoramaId, publinkId, hadronId, pubcid, imuid, 33acrossId
+userIds: identityLink, netId, fabrickId, zeotapIdPlus, uid2, unifiedId, id5Id, lotamePanoramaId, publinkId, hadronId, pubcid, imuid, 33acrossId, nonID
 pbs_app_supported: true
 schain_supported: true
 coppa_supported: true
@@ -419,8 +419,8 @@ If you are using Index's outstream player and have placed the video object at th
 
 | Name | Scope | Type | Description |
 |---|---|---|---|
-| `video.w` | Required | Integer | The width of the video player in pixels that will be passed to demand partners. You must define the size of the video player using the `video.w` and `video.h` parameters, with a minimum video player size of `300 x 250`. |
-| `video.h` | Required | Integer | The height of the video player in pixels that will be passed to demand partners. You must define the size of the video player using the `video.w` and `video.h` parameters, with a minimum video player size of `300 x 250`. |
+| `video.w` | Required | Integer | The width of the video player in pixels that will be passed to demand partners. You must define the size of the video player using the `video.w` and `video.h` parameters. We strongly recommend video sizes to be `256 x 256` or greater, `300 x 250`, or `320 x 180`. |
+| `video.h` | Required | Integer | The height of the video player in pixels that will be passed to demand partners. You must define the size of the video player using the `video.w` and `video.h` parameters. We strongly recommend video sizes to be `256 x 256` or greater, `300 x 250`, or `320 x 180`. |
 | `video.playerSize` | Required | Integer[] | The video player size that will be passed to demand partners. |
 | `video.playerConfig` | Optional | Hash | The Index-specific outstream player configurations. |
 | `video.playerConfig.floatOnScroll` | Optional | Boolean | A boolean specifying whether you want to use the player's floating capabilities, where:<br />- `true`: Use the Index player's float capabilities.<br /> **Note:** If you set `floatOnScroll` to `true`, Index updates the placement value to `5`.<br /> **Note:** We do not recommend using the player's default float capabilities if you have more than one outstream ad unit per page. <br /> - `false`: Do not use the Index player's float capabilities (default). |