Transparent Videos are supported by all major browsers in one way or another now.
You can read about this here:
And see a demo here:
https://transparency-demo.webflow.io/
or here:
Marketers / Designers will be able to use it to create a way of showcasing information in video format without breaking out of the flow of a website with a video player with hard square corners.
Essentially you need to provide 2 video files, one for chrome and firefox, edge etc encoded as a VP9 .webm video and the other as a H265 encoded .mov or .mp4 file for safari.
Currently hubspots filemanager converts all h265 (hevc) encoded videos to h264 (mpeg-4 AVC) meaning the transparency is lost.
Initially and most important:
We need at least to allow the files to be stored in the file manager, so we can build this solution our selves. Surely this should be relatively straightforward just to add H265 videos as an exception to the automatic conversion process. (H265 videos are usually more highly compressed so it would save space at the same time too)
In the future:
It would be great if alpha transparency support was built into hubspot, hubspot seems to like converting content (e.g. images to webp) so could theoretically build in the automatic process to provide both files for the particular browsers.