1. In the very beginning you can see css-map, it helps you to find all you want to change.
CSS:

2. Just change logo's text in header there:
HTML:

3. You can change backgrounds images in inline styles.

4. You should insert link from YouTube instead of this example.

Also you can insert link from YouTube here:

5. All of sliders are built using the swiper.js plugin, you can find the documentation here: swiperjs.com/
JS:

6. All images you can change here:

7. This code is for timer. If you want, you can put here number, which you need:

8. If you need parallax for background, you can add this class:
HTML:

JS:

9. Filter is built using the Isotope plugin, you can find the documentation here: https://isotope.metafizzy.co/

jQuery http://jquery.com/
Bootstrap http://getbootstrap.com/
In this project Bootstrap is used only grid.
Magnific Popup https://dimsemenov.com/plugins/magnific-popup/
Magnific Popup is used for video.
Swiper https://swiperjs.com/
AOS - Animate On Scroll Library https://michalsnik.github.io/aos/
Isotope https://isotope.metafizzy.co/
ANIMSITION https://git.blivesta.com/animsition/