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MicroscoPy
An open-source, motorized, and modular microscope built using LEGO bricks, Arduino, Raspberry Pi and 3D printing.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
I don't think the video was intended to be the instructions. There's a link below the video to https://github.com/IBM/MicroscoPy which looks (based on a 30-second skim) much more comprehensive.
There's also the mostly 3D printed (minus optics of course) and open source PUMA microscope (https://github.com/TadPath/PUMA).
NOTE:
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Hence, a higher number means a more popular project.