As of September 2014, YouTube's own keyword tool stopped working. It was moved over to Display Planner's AdWords video keyword suggestions. To use it, you need to have an Google Ads account. Just like the non-existent YouTube keyword tool, it was created to facilitate paid video and ads promotion. Which is why keywords that you will find there might not be closely related to the topic that you want to cover.
Keyword explorer, which was released few weeks back is one of the most exhaustive tools that we have see off late. Keyword Ideas, Phrase Match and KD help content marketers to align their content marketing efforts with organic search trends. Apart from that from an on page point of view, the tool gives everything that modern age webmaster need to track their overall performance.
With SEMrush, companies can compare their advertising approaches with those of their rivals. By doing so, brands are able to find what makes their competitors popular with the consumers advertising-wise. This also allows them to adjust their budgets by uncovering the ad spend and return their competitions have. Thus, they can further enhance their campaigns with newly acquired knowledge and localize their messages.
Traffic pulling and having a successful conversion rate is the first and only priority for any and every company. Mostly, marketers indulge in Search Marketing. Real time analysis and competitor monitoring acts as a gateway to ways in which more traffic can be diverted to your own website through search engines like Google, Bing, Yahoo, and others.
Overall: Overall, SEMrush is definitely the best in class SEO, PPC and digital marketing tool in general. While other tools can become a little more specialized in a specific field of digital (Moz for SEO, for example), SEMrush allows you utilize one tool for all insights, planning, tracking and reporting at a very affordable cost all things considered.