The attached file, besides the the following link have many resources on the surviellance technology

https://www.google.jo/search?q=surviellance+technology+patients+critical&oq=surviellance+technology+patients+critical&aqs=chrome..69i57.10988j0j7&sourceid=chrome&ie=UTF-8

I am not sure about fall risk monitoring but I can tell you my observation from psychiatry filed. The initial response for the video-monitoring and recording of patients' area was always negative, but, when it in place, multiple cases of violence in mental health area (emergency department, psychiatric intensive care and general floor), actually, helped to protect staff legally each time when patient or his / her family decided to complain, as each time we saw a proper conduct from the staff site and extreme behavior dis-regulation from the patients' site. Therefore, usually, some time after the installation of the video monitoring (and recording) system, nursing staff like and appreciate it as a part of protection for the liability.

Dear Mikkel, I hope some of these references may be of use. 

Kutney-Lee, A, Lake, E.T. & Aitken, L.H. (2009). Development of the Hospital Nurse Surveillance Capacity Profile. Res Nurs Health. 32(2), 217–228.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2906760/

Lopez K.D, Gerling, G.J., Cary, M.P. & Kanak, M. (2010). Cognitive work analysis to evaluate the problem of patient falls in an inpatient setting. J Am Med Inform Assoc. 2010 May 1; 17(3): 313–321. https://www.ncbi.nlm.nih.gov/pmc/articles/mid/NIHMS208387/

El-Bendary, N., Tan, Q., Pivot, F.C. & Lam, A. (2013). Fall Detection and Prevention in the Elderly: A Review of Trends and Challenges. INTERNATIONAL JOURNAL ON SMART SENSING AND INTELLIGENT SYSTEMS. 6(3), 1230- 1266. http://s2is.org/Issues/v6/n3/papers/paper23.pdf

Avvenuti, M.; Baker, C.; Light, J.; Tulpan, D. & Vecchio, A. 2010). Non-intrusive patient monitoring of Alzheimer’s disease subjects using wireless sensor networks. http://nparc.cisti-icist.nrc-cnrc.gc.ca/eng/view/object/?id=2ade8b37-e450-4901-b45d-be9b5dc259ee

 Curry, P.J. & Jungquist, C.R. (2014). A critical assessment of monitoring practices, patient deterioration, and alarm fatigue on inpatient wards: a review. Patient Safety in Surgery, 148:29DOI: 10.1186/1754-9493-8-29. http://pssjournal.biomedcentral.com/articles/10.1186/1754-9493-8-29

Habib, et al. (2014). Smartphone-Based Solutions for Fall Detection and Prevention: Challenges and Open Issues. Sensors 2014, 14(4), 7181-7208; doi:10.3390/s140407181. http://www.mdpi.com/1424-8220/14/4/7181/htm

Schmidt, P.E. et al (n.d.). Impact of introducing an electronic physiological surveillance system on hospital mortality. (Accessed on 11 Nov. 2016) from: http://eprints.port.ac.uk/17475/1/Impact_of_electronic_surveillance_on_mortality_preprint_final.pdf

Gough, R.; Ballardie, R. & Brewer, P. (2014). New technology and nurses. Labour & Industry: A Journal Of The Social And Economic Relations Of Work. 24(1). http://dx.doi.org/10.1080/10301763.2013.877118

Wright, K.M. (2006). Falling Head over Heels Reducing Falls in High Risk Neurosurgical Inpatients with the implementation of a ‘High Risk Falls Room’. Australasian Journal of Neuroscience. 1-28. http://103.241.3.21/~annaasn/wp-content/uploads/2011/09/AJONVol18Issue1.pdf#page=3

 Tres’, D.P., et al. (2016). QUALITY OF CARE AND PATIENT SAFETY: ASSESSMENT BASED ON INDICATORS. Cogitare Enferm. 2016 v. 21 n. esp: 01-07. https://www.researchgate.net/profile/Joao_Lucas_Campos_De_Oliveira/publication/306296195_QUALITY_OF_CARE_AND_PATIENT_SAFETY_ASSESSMENT_BASED_ON_INDICATORS_-_QUALIDADE_DA_ASSISTENCIA_E_SEGURANCA_DO_PACIENTE_AVALIACAO_POR_INDICADORES/links/57e3eeca08ae7b8233c917c3.pdf

Article QUALITY OF CARE AND PATIENT SAFETY: ASSESSMENT BASED ON INDI...

Interesting, I do agree with Boris Bard