Lazy load on video listing

Hi,

My video page is this:

[column width="1/1" last="true" title="" title_type="single" animation="none" implicit="true"]

[aiovg_videos]

[/column]

Link: https://fundacioncb.es/videos

I want to make the lazy load effect on: https://www.fundacioncb.es/exposiciones/

I think the lazy load line is this (highlighted):

[blank h=”40″ hide_low_res=”true” class=””]

[/blank]

[column width=”1/1″ last=”true” title=”” title_type=”single” animation=”none” implicit=”true”]

[blog layout=”masonry” column=”3″ count=”13″ show_content=”true” nopaging=”false” cat=”45″ posts=””]

[/blog]

[/column]

[blank h=”50″ hide_low_res=”true” class=””]

[/blank]

How i can do the effect? Thanks.