12. A system for delivering related video content for augmented keywords on a web page, the system comprising: a server comprising a processor, the server receiving from an agent executing within a browser, responsive to the agent detecting a mouse over a keyword currently displayed on a web page of a client, the keyword identified for augmentation via a user interface overlay and identifying a plurality of videos related to the keyword, the server configured to dynamically select, responsive to receiving the keyword at a time of the mouse over, one or more videos for the user interface overlay for the keyword; a content relevancy engine determining an order of relevance of the plurality of videos to the keyword; and wherein the server selects one or more videos of the plurality of videos with a higher order of relevance and transmits to the agent of the client, within a predetermined time period from receipt of the keyword from the agent responsive to the agent detecting the mouse over, the user interface overlay, to be displayed by the agent responsive to the mouse over, to include the selected one or more videos of the plurality of videos with a higher order of relevance for at least one of user selection or display in the user interface overlay, the predetermined time period comprising a time threshold within which the server is to complete the selection of the one or more videos and to complete delivery of the selected one or more videos to the client.
16. The system of claim 12 , wherein the server receives the keyword responsive the indication that the user selected the keyword.