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.
Adding Videos
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).

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