real KoboCollect forms

Dear Kobo Users:
Could you please share some videos of your real use of Kobocollect to fill your forms?
If you have forms with repeat groups, please could you please explain me how you have to slide your fingers to insert the next group?
I have used a repeat group in my form to obtain multiple pictures with some notes (in text questions), but when I launch this form in Kobocollect, then I can only fill the first picture and its note, however I can not enter the second picture, neither the third nor the next pictures I would like. I tried sliding on the screen my finger to the left, or to the right, at that point, but anything seems to work in order to get into the next group to be able to take the next picture and write its note.
Regards,
Edgar