what are tags in our website while uploading?

Tags are simple pieces of data usually no more than one to three words that describe information on a document, web page, or another digital file. Tags provide details about an item and make it easy to locate related items that have the same tag. [courtesy:https://www.thoughtco.com/tagging-advantages-3469879]

What is Manage sessions means in "settings"?

It shows in which machine and software you have used to access our website.

How to add profile/cover images?

Go to settings and select Avatar & Cover banner to upload your profile and cover pictures. https://www.unreach.in/settings/avatar/

How to add/save videos?

First select video to play. While playing you can click "add to" below the video player. You can select/on "watch later" or you can "create" a new folder and then select/on the particular created folder.