Properties:
| Name | Value | Type | Description | 
|---|---|---|---|
| RELOAD | reload | string | Allow codec switching which will always involve reloading
the . | 
| SMOOTH | smooth | string | Allow codec switching; determine if SourceBuffer.changeTypeis available and attempt to use this first, but fall back to reloadingMediaSourceif not available.Note: Some devices that support SourceBuffer.changeTypecan
become stuck in a pause state. |