Interactive Videos for Use in Google Slides
Right click on any video you wish to use in a Slides file and choose "copy video URL".
Then, on your slide, click "Insert", "Video", "by URL" and paste the link.
Timers for use in Google Slides
Each set of timers below is a playlist of multiple timers.
10 Second Timers
15 Second Timers
20 Second Timers
30 Second Timers
Click the menu to see all of the timer options in each playlist.
Click to view, then X out of the menu.
Right click to copy URL of video you want to use.
Then, on your slide, click "Insert",
and paste the link.
45 Second Timers
60 Second Timers
2 to 5 Minute Timers
6 to 20 Minute Timers
Ben Pirillo Timers - 10 to 60 seconds
Check out Ben's TpT Store for more great resources.