rekkaBlog
Guides and honest comparisons on making explainer videos.
Best tools to turn a PDF into a video in 2026, compared
Ten PDF to video tools compared by what ends up on screen, what's free, and what the cheapest paid plan costs. Prices checked on each vendor's site in November 2026.
ComparisonPdf to videoHow to convert a Word document into a video
Three ways to turn a .docx into a narrated video, from recording yourself over slides to sending the file to a generator, and what each one costs you in time.
How-toDocumentsHow to explain a research paper in a video
A four-part structure for paper summary videos (problem, method, result, limitation), how to script and record one, and an example made from the GPT-2 paper.
How-toResearchHow to make a video from a PDF
The ways to turn a PDF into a video, from scrolling screen recordings to slideshow edits to AI tools that read the document and explain it, and what each one is good for.
How-toPdf to videoHow to turn a Keynote presentation into a video
How to export Keynote as a movie with recorded narration, what the export settings mean, and how to get a narrated explainer made from a Keynote file instead.
How-toKeynote to videoHow to turn a PowerPoint into a video (with narration)
Three ways to convert a PowerPoint deck into a narrated video, from PowerPoint's own export to screen recording to having the explanation written and drawn for you.
How-toPpt to videoHow to turn a textbook chapter into a video
How to make study videos from a textbook chapter, by recording one yourself or photographing the pages and generating it, plus how to split a chapter so the videos stay useful.
How-toStudyingHow to turn Google Slides into a video (with a voiceover)
Google Slides has no export to video. Here are the workarounds that actually work, from screen recording to PowerPoint, plus how to get a narrated explainer straight from the deck.
How-toGoogle slides to videoHow to turn lecture notes into a video
Turning typed or handwritten lecture notes into a short narrated video, by hand or with a generator, and why the teach-back script is the part that helps you learn.
How-toStudyingNotebookLM Video Overviews vs Rekka for turning a PDF into a video
How Google's Video Overviews (now in Gemini Notebook) compare with Rekka for turning a PDF or document into a narrated video, and when each one makes sense.
ComparisonPdf to videoSynthesia alternatives for training videos in 2026
Synthesia, Colossyan, HeyGen, Vyond, Powtoon and Rekka compared for L&D teams, with current prices, SCORM support and who each one suits.
ComparisonTrainingHow compound interest works, explained with a whiteboard video
Compound interest in plain words, with worked examples, the formula, how often it compounds, the Rule of 72, and a 90-second whiteboard video.
ExplainerFinanceWhiteboard animationAI whiteboard animation generators: what actually works in 2026
What AI whiteboard video tools can and cannot do today, and how prompt-to-video compares to traditional editors.
AIWhiteboard animation6 Doodly alternatives worth trying in 2026
Honest look at whiteboard animation tools beyond Doodly, including AI options that skip the drag-and-drop work entirely.
ComparisonWhiteboard animationHow to make a whiteboard animation, step by step
The full process from idea to finished whiteboard video, whether you draw it yourself, use an editor, or generate it.
How-toWhiteboard animationVideoScribe vs Doodly: which should you pick in 2026?
A straight comparison of the two best known whiteboard animation editors, and when neither is the right call.
ComparisonWhiteboard animationThe best whiteboard animation software in 2026
What actually matters when picking whiteboard animation software, and which tools fit which kind of creator.
ComparisonWhiteboard animation