Decode Consumption Method values

I am reviewing the usage data for our Power BI reports. I am trying to decode the Consumption Method values to understand what user behaviors correlate with the different values; specifically for the View Report Activity. Here I can see Consumption Method defined as "How users opened the report, such as via the Power BI service (powerbi.com), Power BI Embedded, or a mobile device."

For example the values I am returning are...

1. Power BI Web
2. Power BI Mobile
3. Simplified Embedding
4. Embedding for your organization
5. UNKNOWN

Values #1 and #2 are straight forward.

I am not having any luck understanding what user behaviors correlate to #3 and #4. Embed in Teams? Embed in PPT? Other possibilities?

Value #5 shows a significant % as UNKOWN. What circumstances would cause a View Report activity to have an UNKNOWN Consumption Method?