Hi @ravals ??
> Is it possible to add a URL to the images published in the activity stream?
Do you want to achieve such behavior where the user can be navigated to its single media URL when s/he clicks on any media from the activity page?
If so then you can simply disable the dedicated settings from rtMedia settings tab.
Go to Dashboard > rtMedia Settings > Display > Use lightbox to display media
disable this settings and click on Save Settings
button. Refresh the activity page and click on any media. This way, it will directly open the media on its particular URL.
Let me know if we are on the same page.
Regards,
Krupa