Have you tried to put in stream folder AND setting a data file entry ? See this post for ytyp Streamed YTYP works only after disconnect / reconnect
Here is the related __resource.lua
resource_manifest_version '05cfa83c-a124-4cfa-a768-c24a5811d8f9'
data_file 'DLC_ITYP_REQUEST' 'stream/props.ytyp'