In order to edit the PLAY VIDEO button of the slider, please go to Dashboard > Slider Revolution > Band
Next, click on the button layer:
Click on the eye icon to enable the youtube link settings (as soon as you're ready, you have to re-click the icon)
Click on the camera image, then you can edit the youtube ID in the right column:
Edit the social icons' links
Click on each text layer, next locate the Actions button from the Layer options menu:
Here you can edit the link's URL, interaction, action type, link target, etc.