You can watch the recording for this webinar here. Additionally, below are some resources that might be of interest if you would like to dig deeper on the content from the webinar. If you have any questions, please post below. Thank you for your time and interest.
Additional Resources:
ArcGIS REST API
https://developers.arcgis.com/rest/
ArcGIS API for JavaScript
https://developers.arcgis.com/javascript/
Open Source Web Mapping Libraries
https://developers.arcgis.com/documentation/mapping-apis-and-services/apis-and-sdks/
ArcGIS API for Python
https://developers.arcgis.com/python/
Runtime APIs:
https://developers.arcgis.com/net/
https://developers.arcgis.com/android/
https://developers.arcgis.com/ios/
https://developers.arcgis.com/java/