share from Photos to Viber

[zoran]

How can i use the share command to send a video i have in Photos, to Viber? When selecting the video and then clicking on the share command, i can see only a number of apps to share to and Viber is not in that list.
If i press More, i can see more apps, including Viber, but it has a check box next to it and i cant do anything more. Am i doing something wrong?

 

[zoran]

When wanting to share videos or photos, shouldn't viber (or any other app) be there on the list, so one can send the stuff he selected?
Here is the list im referring to and although Viber is selected as seen in the previous pic, its still not listed in it!
Why does this happen, can it be fixed?