The Sources -> Edit Source -> Proxy toggle now renders for Yattee
Server entries (supportsVideoProxying gains .yatteeServer). When the
toggle is on, playback fetches go through
videoWithProxyStreamsAndCaptionsAndStoryboards with mode .relay, so
the server returns signed /proxy/relay URLs (byte-relay, supports
HTTP Range, no on-disk caching). Downloads keep going through mode
.download so the server-side /proxy/fast/ flow continues to cache
files for repeat use.
InvidiousAPI.proxyStreamsIfNeeded early-returns for .yatteeServer
since proxying is now done at fetch time via ?proxy=true rather than
client-side host rewriting.
Preserve user:pass credentials in instance URLs so Invidious instances
behind nginx reverse proxies with HTTP basic auth work correctly (#926).
Add displayURL property to mask credentials in the UI.
Adds a "Proxy videos" toggle in instance settings that routes video
streams through the instance instead of connecting directly to YouTube
CDN. Includes auto-detection of 403 blocks and live re-application of
proxy settings without requiring app restart or video reload.
