Power apps tutorial template screen

Hi!

I have added a tutorial screen template in an application (a kind of small user guide). For this user guide, I use images and small videos.

I have a Gallery, with the following formula for the "Items":

Table(
{Step: 0, Title: "First step", Text:" short description", Image1: 'sample image', Video: 'sample video'},
{Step: 1, Title: "Second step" ,Text:" short description", Image1: 'sample image 1',Video:'sample video 2'},

{Step: 2, Title: "Third step" ,Text:" short description", Image2: 'sample image 2',Video:'sample video 2'},

{Step: 3, Title: "Fourth step" ,Text:" short description", Image3: 'sample image 3',Video:'sample video 3'}

)

I would like to store the images and videos in a SharePoint library and not in the application.

I was thinking to create a collection and to extract the pictures and videos from there. I could extract the image using the "Thumbnail" but I don't know how to handle the video.

This is what I tried:

Table(
{
Step: 0,
Title: "Menu list",
Image1: LookUp(
colImages,
Title = ThisRecord.Title
).'{Thumbnail}'.Large,
Video: EndsWith(LookUp(
UserGuide_1,
'File name with extension'=ThisRecord.'File name with extension').'File name with extension',"mp4")
}
)