In the UK The "British board of film classification" is responsible for the ratings and regulations from everything such as video games, films, TV shows and music videos that are distributed through the UK. Founded in 1912 by the film industry the BBFC is widely respected and recognised organisation when it comes to the classification of media products. A list of the companies and organisations that recognise and use their regulations would be as follows:
Regulation guidelines and certificates

From these guidelines and also from the websites official guidelines I believe that my music video would be rated as a 15. This is because three of these categories have been strongly met with one category debatable/up for question . The categories which have been met are highlighted and underlined in red.
Discrimination
The work as a whole must not endorse discriminatory language or behaviour, although there may be racist, homophobic or other discriminatory themes and language.
Drugs
Drug taking may be shown but the work as a whole must not promote or encourage drug misuse (for example, through instructional detail). The misuse of easily accessible and highly dangerous substances (for example, aerosols or solvents) is unlikely to be acceptable.
>>In regards to drugs the only drugs shown in my music video are cigarettes and alcohol. Both are only briefly shown and, from my own judgement, are not glamorised or promoted. Therefore this hits the 15 rating but does not exceed to the criteria of being rated 18.
Imitable behaviour
Dangerous behaviour (for example, hanging, suicide and self-harming) should not dwell on detail which could be copied. Whether the depiction of easily accessible weapons is acceptable will depend on factors such as realism, context and setting.
>>Self harm is a theme that I plan to touch upon in my music video, however I am still in the editing process and may choose to cut it from my final video. If I do choose to keep the scenes the scenes which are kept only tease/cleverly depict self harm so that gore and Imitable themes are not fully explored and displayed on screen
Language
There may be strong language. Very strong language may be permitted, depending on the manner in which it is used, who is using the language, its frequency within the work as a whole and any special contextual justification.
Nudity
There are no constraints on nudity in a non-sexual or educational context. There may be nudity in a sexual context but usually without strong detail.
>>Nudity is the category which can be up for debate. In my music video there is a scene which depicts a male laying in the bathtub, the reason why this is up for debate is due to the fact that only the top half of the body is shown and is mostly concealed from the shot.
Sex
Sexual activity may be portrayed, but usually without strong detail. There may be strong verbal references to sexual behaviour, but the strongest references are unlikely to be acceptable unless justified by context. Works whose primary purpose is sexual arousal or stimulation are unlikely to be acceptable.
Threat
There may be strong threat and horror. A sustained focus on sadistic or sexual threat is unlikely to be acceptable.
Violence
Violence may be strong but should not dwell on the infliction of pain or injury. The strongest gory images are unlikely to be acceptable. Strong sadistic violence is also unlikely to be acceptable. There may be detailed verbal references to sexual violence but the depiction of sexual violence must be discreet and justified by context.>>The only violence in my music video is that of domestic violence. The violence shown is not gruesome nor strong. Therefore I don't believe that this category is strongly met with my music video, however the part that is up for debate is that of the self harm scenes which do show fake blood and therefore I would still rate my music video 15 on this fact alone.
The British Board of Film Classification, previously the British Board of Film Censors, is a non-governmental organization, founded by the film industry in 1912 and responsible for the national classification and censorship of films exhibited at cinemas and video works released on physical media within the United Kingdom. It has a statutory requirement to classify videos, DVDs and, to a lesser extent, some video games under the Video Recordings Act 2010.