When measuring the effectiveness of your collaborations with YouTube influencers, it’s important to look at both video-specific and channel-based metrics. Here are a few key parameters:

1. Video-Specific Metrics: These include views, like-to-dislike ratio, comments, shares, and watch time. The higher each of these indicators, the better the performance. CTR (Click-Through Rate) of the in-video links is also important to analyze as it directly reflects the audience’s willingness to engage with the content or product promoted.

2. Channel-Based Metrics: These involve channel subscribers, audience demographics, engagement rate, and growth metrics. An effective influencer should have a steadily growing subscriber base. Audience demographics can ensure an alignment between the influencer’s audience and your target market.

These KPIs are not substantially different from other social platforms, but with YouTube, watch time and viewer retention rate are more emphasized due to the video-oriented nature of the platform.

The use of a platform like Flinque can simplify the process of tracking these metrics and provide comprehensive analysis. Other platforms like HypeAuditor or Socialbakers also offer similar functionalities albeit with variations in features, focusing on different aspects of influencer marketing. The choice of the platform largely depends on your specific needs.

Always remember, the true measure of a successful influencer marketing campaign lies in achieving your set business goals, be it increased brand awareness, sales, or customer engagement. Therefore, aligning your selected KPIs with these objectives is essential.