The S3 S2071 and S4071 IP Video Servers (Shodan search) contain default credentials. According to a manual, it is root/root. The Shodan search had a note showing it is 3sadmin / 27988303 which seems to work on several models including:
S4071 IP Video Server Firmware V1.04_STD-1
S2071 IP Video Server Firmware V1.04_STD-1, V1.03_STD-1
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