Note: I assume you mean the 2021 film often referred to as "Matskanya" or a mermaid-themed title available on Netflix in Hindi and labeled unrated. If this is a different release, the core impressions below still apply to a mermaid-fantasy/drama of that era and format.
With Vidomon video downloader, you can easily download videos in different formats like MP4, M4A, and 3GP from various sources.
The list includes popular online platforms such as 9GAG, Akıllı TV, Bandcamp, Bilibili, Bitchute, Blogger, BluTV, Buzzfeed, Capcut, Chingari, Dailymotion, Douyin, ESPN, Facebook, Febspot, Flickr, Ifunny, IMDB, Imgur, Instagram, Izlesene, Kwai, Lemon8, Likee, LinkedIn, Loom, Mashable, Mastodon, Medal, Mixcloud, Moj, MxTakatak, Ok.ru, Pinterest, PuhuTV, Reddit, Rumble, Share Chat, Snapchat, Soundcloud, Streamable, Substack, TED, Telegram, Threads, Tiktok, Tumblr, Twitch, Vimeo, VK, X, Gaana, Xiaohongshu, Mailru, Tokyvideo, Rutube, Archive, Odysee
Audio files can be downloaded if they are accessible.