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You can change it in Theme Options -> Header -> Header Mobile -> Header Social network: https://prnt.sc/wk31my
Here is the document: https://document.harutheme.com/formota/
Video tutorial: https://www.youtube.com/channel/UCnOxXtfrkgq92wgqJCBi55g/videos?view_as=subscriber
In our theme have a notice that Page Options will override Theme Options. You can understand more about it follow this topic: https://harutheme.com/forums/topic/why-theme-options-doesnt-apply-changes/
You also can add any field to your video follow this topic tutorial: https://harutheme.com/forums/topic/add-new-metabox-circle-single-video-film-actor-director/
Here is the topic to help you manage Footer: https://harutheme.com/forums/topic/how-to-manage-footer-in-harutheme/
If you have other issues please search on our forum first for the quick solutions.
Hope this helps!