Doodly is the tool I use to make all my doodle videos. It’s best used when paired with another full-functioned video editor.
PlaceIt is an online tool that helps you to create custom intros, Twitch screens, or anything else. I used it to create the opening of every video I post.
Openshot Video Editor is a free video editor that I pair with Doodly for all my videos. It’s not as full-featured as Cyberlink PowerDirector or Adobe Premiere, but it gets the job done and it’s free.