Five years ago this week… Quibi —the short-form mobile video start-up that raised nearly $2 billion—won a key legal battle when a California court denied interactive video company Eko’s attempt to block Quibi’s Turnstyle feature over alleged patent infringement. This was a rare bright spot amid Quibi’s disastrous launch. Although Eko, backed by activist investor Elliott Management, hinted at further legal action, the case gradually lost steam, and today the lawsuit is effectively dormant. Streaming finally dunks on linear: For the first time, streaming viewing (44.8%) has been the combination of cable + broadcast (44.2%) in Nielsen’s The Gauge report. YouTube hit a record 12.5% of viewing hours, with FAST services creeping up too. It took four years…