You can upload your photos and videos either manually via mycloud.ch or by using the myCloud Desktop application.
You can download myCloud Deskto from this link https://desktop.mycloud.ch/ and use it to synchronize your pictures to myCloud in the File section.
Be aware that the pictures will not be automatically displayed into the timeline, but you will have to import them manually following the following instructions.
Using your favorite browser, login into myCloud.ch and then go to files:
If you have already uploaded some folders containing pictures then you will find it there, select it and then on the blue banner above, click on add to photos:
You will now be able to see your Photos in the Timeline.
Be aware that if you continue synchronizing your folder, the changes will not automatically be imported into your timeline.