Here is the guide transcribed into text:
1/ Prepare the surfaces
Make sure the walls are clean, dry and smooth before wallpapering. If necessary, use a filler solution to fill holes and cracks.
2/ Cut the strips of wallpaper
Measure the height and width of the area to be covered, and cut the wallpaper strips accordingly. Make sure to leave a margin of at least 2 cm for the connections.
3/ Prepare the glue
Use a glue specially designed for non-woven wallpaper, and follow the manufacturer's instructions for preparation. Apply the glue: use a paint roller to spread the glue on the surface to be covered, being careful not to use too much.
4/ Apply the wallpaper
Lay the first strip of wallpaper on the prepared surface, making sure to align the edges with the corners of the room. Use a sponge or paint roller to remove air bubbles and secure the wallpaper to the surface.
5/ Connect the strips
For joins, use a wallpaper knife to trim the edges of the wallpaper, making sure to line up the patterns. Apply glue to the edges of the strips, and press them firmly against each other to make them adhere.
6/ Finish the pose
Once all the strips have been installed, use a paint roller to remove the last air bubbles and firmly attach the wallpaper to the surface.
7/ Let dry for at least 24 hours
Before removing masking tape, painting or decorating. Good luck !