Various types of content can be embedded by simple pasting a url into the editor, these include:
YouTube
Vimeo
Flickr
Sway
Scratch
Giphy
Soundcloud
There is more, maps google docs, O365 forms, gists..:
Embedding Media | Glow Blog Help
Category: Media
Audio
A podcast is a series of blog posts with audio (or video) attachments. People can subscribe to your blogs RSS feed to get your new episodes in their podcatcher (for example iTunes or the podcast app on iOS)
Glowcast | An example of and guide to podcasting with Glow Blogs
Video
Glow Blogs are not the best place to store video. Services like YouTube abd Vimeo re format and serve your video in suitable formats for different devices. Some schools and Local Authorities do not allow the use of these services and publishing there may not be appropriate.
You can upload video to Glow Blogs but the size is limited and you need to get the video into a suitable format (we suggest mp4 or m4v) to play.
Handbrake is a useful application to use on the desktop. It is powerful and free.
With Poster Image
Gallery
Is you are posting a set of photos it may be better to add them as a Gallery rather than one at a time. Uploading a camera roll full of photos without out editing and captioning might not be a great idea.
Featured Images
Featured Images are inserted above or beside your post, depending on theme.
They may be used by the blog on an index page or slideshow of posts. They can be used with the display posts plugin and show on the Local Authority home page and if you paste a posts URL into twitter.
Images
When you upload an image to Glow Blogs it is automatically resized down to the setting in Settings->Media (defaulting to 1260 pixels across) and several other copies are made, depending on your theme and settings.
More Details Adding Media | Glow Blog Help
