Mattepaint - Tracking in Nuke

Mixkit: Known for its user-friendly interface, Mixkit provides a vast collection of free video assets, including motion graphics and video templates. While they aren't directly from Videohive, they offer a comparable quality that can be integrated into your projects seamlessly.
Videezy: Videezy offers a variety of free and paid video assets, including After Effects templates. Their extensive library is perfect for those looking to enhance their videos without breaking the bank.
Motion Elements: While Motion Elements primarily focuses on premium content, they regularly feature free downloads that include video templates similar to those found on Videohive. Their search interface allows you to filter out the free options easily.
Editor’s Depot: This site provides free editing tools and templates, ensuring you have access to some elements similar to Videohive offerings. Though the selection might not be as vast, it’s a valuable resource for cost-effective production.
Motion Array: With a solid reputation, Motion Array occasionally offers free downloads that replicate some Videohive elements. Subscribing to their newsletter might help you get alerts about any new freebies available.

https://mattepaint.com/academy/tutorial/tracking-in-nuke/

Join Oleksiy Golovchenko in this tutorial covering all the kinds of point and camera tracking available in Nuke! During this tutorial you will also learn how to put your tracks to use with projection geometry.
In this series we will cover:
2D Tracking - A basic tracking technique which is incredibly useful when you have camera wobble or a nodal camera move with no parallax.
3D Tracking - This is the main tracking technique most footage will need. With 3D tracking skills you will be able to take any footage and create a 3D camera which matches the real world movement of the camera.
Point clouds and Proxy Geo Generation - By generating a point cloud from your 3D camera track, you can not only position elements better but you can even use this point cloud as basic 3D geometry for your work!
2D to 3D Tracking - Learn how to combine 2D tracking and 3D tracking
With the skills of camera tracking under your belt, you'll be well equipped to start working with moving footage and bring your worlds to life!