Media diagnostics · Primary-source explanation; examples are illustrative. Instructions are based on publisher guidance; a UK IPTV account was not tested on this platform.
Record the chosen resource
A page can offer alternative source elements rather than one fixed media URL. MDN defines currentSrc as the absolute URL of the resource chosen for the HTML media element. When two browsers behave differently, copying the first source from markup does not establish that both attempted that resource. Inspect the selected value at the relevant stage and retain enough context to compare the actual choice, without exposing account-bearing URLs publicly.
Use a controlled alternative source example
For an original developer test, create two permitted short alternatives with recognisable filenames and record which one is selected in each supported environment. Compare that result with the intended source selection rules. If currentSrc is empty, record the loading stage rather than inventing a missing hostname. The documentation notes an empty value when the network state is empty, so an immediate read before selection is not equivalent to a later selected resource failure.
Keep modern player plumbing in scope
A selected URL is an observation of the element resource, not necessarily a complete inventory of every segment, licence or application request involved in a player. Do not treat it as a public download link or assume it can be reused outside the authorised session. Pair it with the actual failure stage and media format where appropriate. This technique checks a source selection question and does not establish programme rights, a native app identity or successful account access.