diff --git a/index.bs b/index.bs
index fc2e010..28cc95b 100644
--- a/index.bs
+++ b/index.bs
@@ -464,10 +464,12 @@ spec: encrypted-media-draft; for: EME; urlPrefix: https://w3c.github.io/encrypte
member represents the ability to do spatial prediction, that is,
using frames of a resolution different than the current resolution as
dependencies. If absent, spatialScalability will default to
- false
. spatialScalability is closely coupled to
- {{VideoConfiguration/scalabilityMode}} in the sense that streams encoded
- with modes using spatial scalability (e.g. "L2T1") can only be decoded
- if spatialScalability is supported. spatialScalability is only
+ false
. If spatialScalability is set to true
,
+ the decoder can decode any {{VideoConfiguration/scalabilityMode}}
+ that the encoder can encode for the configured codec. If spatialScalability
+ is set to false
, the decoder cannot decode spatial scalability
+ modes, but can decode all other {{VideoConfiguration/scalabilityMode}} values
+ that the encoder can encode for the configured codec. spatialScalability is only
applicable to {{MediaDecodingConfiguration}} for types {{media-source}},
{{file}}, and {{MediaDecodingType/webrtc}}.