WEBM vs MP4 for demo videos
For demo videos on the web, WEBM is almost always enough: YouTube, Product Hunt, X, LinkedIn, Discord and every modern browser accept it directly. MP4 still matters for older desktop editors, some presentation software and iOS-native workflows. ReelCap records WEBM for free — and with Pro it records straight to MP4 or converts a finished take in the preview tab, entirely on your device.
Doing it without an extension
- 1Check whether your destination actually needs MP4 — most upload forms take WEBM without complaint.
- 2If it does, install ffmpeg, or use any local converter you already trust.
- 3Run a single conversion command over the recording, keeping the original as your master.
- 4Upload the converted file, and keep the WEBM for future re-exports.
Where that falls short
- Every re-encode costs a little quality, so converting more than once compounds the loss.
- Online converters mean uploading your recording to a stranger's server — the opposite of recording locally.
- MP4 files of the same visual quality are usually larger than the WEBM you started with.
Doing it with ReelCap
- 1Record in ReelCap and download the WEBM — upload it as-is to YouTube, Product Hunt and social platforms.
- 2When a tool insists on MP4, pick MP4 as the output format in the popup (Pro) and the recording is MP4 from the start.
- 3Or press Export MP4 in the preview tab: the conversion runs once, locally, in your browser.
- 4Keep the original recording as the master, so future exports start from full quality.
Every step happens in your browser. Nothing is uploaded, and the export carries no watermark.