In a post just over a year ago I recommended you take a look at Seesaw. Since then they have made some more improvements. Here I will list 4 of them for you.
Multiple URLs on the Canvas
Multiple URLs on the canvas makes using Seesaw to create choice boards super easy. Any object on the canvas can have a link applied to it. Just select the object and click the three dots menu and choose the link option.
The second new feature is that you can now add a video to each page of the activity. The video can be recorded using your webcam (up to 5 minutes) or uploaded from your computer (up to 500Mb in Size).