I’m not sure about Avelon specifically, but I am the developer of Arctic and since I’ve seen several posts about this issue in several clients with no developer responses, I thought I would chime in.
Most clients (mine included) rely heavily on opengraph metadata for generating link previews, and presenting in-line content. This includes information like titles, descriptions, direct image/video links, etc. RedGifs serves opengraph data on all of their webpages and this is how (i’d assume) most clients retrieve the video link for displaying the media in-app.
Well recently (in the last few weeks) RedGifs made some changes. They still serve all the same metadata, however the video link they provide will not load unless accessed via their API. Well this is kind of silly, why provide the link if it cannot be used. Anyway, due to these changes, I decided to apply for a client key for their API. They do have some restrictions as to what type of clients can use their API, but Lemmy apps on apple/google storefronts should fit their guidelines. However it has been several weeks since I applied for the API key, and I have received no response. I’m not sure if other clients have had similar issues or not, but I though I’d share my own experience with attempting to resolve this in my client.