For an easier choice, it's worth looking at some real examples from the Blackmagic ATEM series, depending on the type of production and the needs of each setup.
For small live streams, webinars and podcasts
For small live streams, webinars, podcasts and presentations with HDMI cameras, a very practical option is the Blackmagic ATEM Mini Pro. It offers 4 HDMI inputs, hardware streaming engine, recording to USB disks, USB webcam output, built-in audio mixer, DVE, transitions, chroma key and the ability to use still graphics. It is ideal for YouTube, Zoom, Teams, Facebook Live and small corporate or educational setups.

For live streaming with post-production capability
If you need the same simplicity but also post-production capabilities after the live, the ATEM Mini Pro ISO is a better choice. In addition to the capabilities of ATEM Mini Pro, it offers ISO recording of all inputs and creates a DaVinci Resolve project, so you can open the live as an edit and make corrections, shot changes, color correction or final editing.

For more HDMI sources and more complex setups
For more demanding HDMI productions with more sources, the ATEM Mini Extreme ISO G2 is the most complete solution in the ATEM Mini family. With 8 HDMI inputs, built-in streaming, multiview, USB webcam, DVE, chroma key, media player and ISO recording of all inputs, it is suitable for larger podcasts, hybrid events, small studios, houses of worship and productions where more cameras are needed without moving to an SDI infrastructure.
For SDI productions and small control rooms
For SDI-based setups, such as educational studios, houses of worship, small control rooms, sports broadcasts or corporate production rooms, the ATEM Television Studio HD8 is a very powerful option. It offers 8 x 3G-SDI inputs, integrated broadcast control panel, streaming, recording, multiview, DVE, keyers, USB webcam, media players and talkback. It is an all-in-one SDI switcher that can stand up very well to fixed and portable productions.

For Ultra HD and 4K productions
For 4K / Ultra HD productions, the ATEM Television Studio 4K8 is the natural choice. With 8 x 12G-SDI inputs, 10 x 12G-SDI aux outputs, 4-port 10G Ethernet switch and Ultra HD workflow, it is aimed at more demanding productions that need higher resolution, professional SDI connections and more outputs for recorders, monitors or distribution.

For IP video and SMPTE-2110 installations
For installations designed around IP video and SMPTE-2110, the ATEM 4 M/E Constellation IP is the option that brings the ATEM workflow to a native IP environment. With 100G Ethernet SMPTE-2110 connections, a large number of inputs/outputs and the ability to operate in modern IP broadcast infrastructures, it is suitable for control rooms, broadcasters, large studios and hybrid SDI/IP facilities that want to move towards the future of broadcast infrastructure.
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Η Comart, official reseller of products Blackmagic Design, has many years of experience in the field broadcast, video editing and professional post-production solutions. We are by your side with specialized advice, immediate support and service to help you achieve your creative goals.