# NextSeq 500/550 Run Quality and Best Practices Support Webinar Video

This support webinar video discusses the NextSeq 500/550 sequencing platform, reviewing problem phenotypes, and the underlying causes. It covers the following topics: basic mechanics of the NextSeq 500/550 system, 2-color chemistry, expected data output from NextSeq 500/550 runs, changes with the upgrade to NextSeq Control Software v4.0, assessment of runs in progress using Sequencing Analysis Viewer (SAV), and tips and best practices.

Link:

{% embed url="<https://www.youtube.com/watch?v=dAvEb-c2YMk&ab_channel=Illumina>" %}

Video length: 47:17 min

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| *For any feedback or questions regarding this article (Illumina Knowledge Article #8045), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000008045%20-%20Instrumentation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |