By lun neh 
It is feasible to successfully watermark over-the-top (OTT) content, which is possible thanks to a method that is very efficient. Therefore, over-the-top (OTT) content can be safeguarded from unauthorised use.
The rise in popularity of over-the-top (OTT) and video-on-demand (VOD) content has resulted in an increase in the need for watermarking solutions, which has in turn led to an increase in the number of solutions that are currently available. These solutions were established with the goal of preventing the content from being utilised or disseminated in a manner that was not authorised; as a result, they have contributed to the current increase in demand. In light of this reality, the deployment of watermark detection necessitates the use of tactics that are capable of recognising certain user accounts or streaming sessions. Streaming sessions can be identified by the fact that they are connected to an online service. The identification of data leakers and the formulation of an attack strategy that will be most successful against them are both significantly aided by the detection of watermarks. Using watermarking techniques that are considered to be “standard” is not an option for meeting the requirement because it is not practicable.
The session-based video watermarking approach comes into gear once we reach this point in the calculation, allowing us to proceed with the process. As a direct consequence of the availability of HD monitors and cameras, the problem that is widely referred to as the “analogue hole” has grown increasingly widespread. This is one of the reasons why session-based watermarking is being researched as a possible solution to the problem.
You will need to produce two completely unique variants of the same data in order to make a session-based watermark. It is necessary to do this (called A and B variants). Through the utilisation of adaptive bitrate distribution, the files are segmented into more manageable chunks, and the playouts are arranged in accordance with a pattern of As and Bs that has been predetermined. The one-of-a-kind A/B sequence is taken into consideration during the process of selecting the individuals who will take part in the session. This contributes to ensuring that the information collected from the session is correct. Each chunk that is utilised originates from either Track A or Track B, and the track from which it originates is determined by a random selection. After these chunks have been utilised, they are then separated into session-based manifests along with descriptions of the various chunks and combinations that can be utilised.
When using a content delivery network to cache only two copies of the data, there is no longer a requirement for any client-side integrations that are carried out by third parties (CDN). This is the case because the server-side manifests already have all of the necessary information, which is the reason why this is the case. This is the reason why this is the scenario. Because of this, it is no longer necessary to produce or store as many versions of the content as there are users on a content-sharing network because there is no longer a desire for doing so. As a result of this, it is no longer necessary to produce or store as many versions of the content as there are users. This is due to the fact that fewer people are now utilising the site. As a consequence of this, carrying out the action is not necessary any longer; it is no longer an unquestionable prerequisite.
Producers and streaming services are able to protect themselves against a wide variety of threats, including collusion and the manipulation of playlists, which might put their level of security in jeopardy if they do not use session-based watermarking. Using a method known as server-side watermarking, it is possible to provide an additional layer of protection for content that is protected by DRM protected content on more than one type of device. This method does away with the necessity of device integration as a prerequisite, thereby making it possible to actually carry it out. This additional safety measure can be installed on any one of a wide variety of electronic devices from a variety of different manufacturers.
These solutions were developed with the intention of preventing the content from being utilised or disseminated in a manner that was not authorized; as a result, they have contributed to the recent increase in demand. As a direct result of this, in order to carry out watermark detection, there is a requirement for methods that are capable of identifying specific user accounts or streaming sessions. The identification of data leakers and the
formulation of an attack strategy that will be most successful against them are both significantly aided by the detection of watermarks. Using watermarking techniques that are considered to be “standard” is not an option for meeting the requirement because it is not practicable.