In a study that evaluated people's interest in exercise videos on the Google platform [34], it was found that, compared to the first half of 2019, searches for videos on physical exercises during the period of the first wave of COVID-19 (year 2020) were substantially higher. This demonstrates the need perceived by users to find strategies to combat sedentary lifestyles and promote well-being in their homes. The literature showed that during the COVID-19 pandemic, a large part of the older adult population sought technologies as an alternative to mitigate the impacts of social isolation, which in turn benefited their mental and physical health [14; 34]. In the case of the older adult population, it is known that there is a positive association between high PA levels and a better general health status [7]. In general, the WHO recommends that to maintain adequate PA levels, it is necessary to perform a weekly minimum of 150 min of moderate-intensity exercise, or 75 min of vigorous-intensity exercise [35]. However, during the COVID-19 pandemic, this was not possible in the usual social context. According to [PERSON] et al. [36], Japanese older adult PA levels decreased during the pandemic by between 5 and 10%. In Brazil, compared to the pre-pandemic period, frail older adults even had PA levels reduced by up to 79% [37], as well as having mobility restrictions five times greater. In the USA, older adults indicated a daily increase of 20.5% in the sitting position [15], which is considered a high-risk factor for a sedentary lifestyle. In turn, investigations have also highlighted that older adults between 60 and 70 years old, who practiced physical exercise regularly during the pandemic, showed increased levels of PA compared to those who are older and inactive [14; 36]. Although Internet-based activities aimed at promoting the physical and mental health of the older adult population during COVID-19 have been widely carried out and disseminated [38], there is no consensus on methodological procedures (i.e., planning, execution, evaluation) of activities. Thus, it is important to disseminate and evaluate different models of strategies for promoting the health of the older adult population in the academic environment via the Internet, as science does not exclude the possibility of new viruses and future pandemics emerging [39; 40]. Therefore, we must be prepared to offer accessible and efficient care measures tailored to different populations [41]. While the COVID-19 virus has been a huge threat to citizens of all countries, there have been nations where the population has been severely impacted in particular. Among these countries, Brazil was one of the countries with the highest number of deaths before the discovery of immunizers [42]. Allied to this fact, a large part of the Brazilian older population lives in a vulnerable situation [43]. During the COVID-19 pandemic, this has become more evident among those residing in the northern and orthest regions (the location of the present study), especially in cities far from large urban centers [44]. Therefore, during the COVID-19 pandemic, it was necessary to create health promotion strategies [45] that would quickly reach the older population. However, in addition to being effective, they should be made attractive through content that is simple to understand and capable of motivating older adults to transform sedentary and sometimes saddening lifestyle habits. To address these challenges, the present study aims to present the methodological procedures of a video-based program \"U3A in Motion\" that was composed of videos of physical exercises and activities to promote the mental health and well-being of the older Brazilian population during the COVID-19 pandemic.