Velosofy is a big youtube channel with almost 1 million subscribers. They offer intros, outros, logos and a lot more designs. You can download it all for free and use it for your website or youtube channel.
They have also a website where you can sort all the videos by software or style.
*Scroll down for demos
How to download
Go to the channel.
Choose a video.
Read the description and click on the download link.
Click on the download button.
You are now on a website and you click on download.