It looks like photos are hyperlinked, not geotagged.
If your photos are located on a local machine, and you are trying to share the hyperlinked points with others on ArcGIS Online, it won't work out.
You could upload the photos on ArcGIS Online, share them with public or your organization and update the excel sheet (preferably in CSV format) with the URL of the photos uploaded in ArcGIS Online.
Using Photos stored in ArcGIS Online
Think Location