Flaky VideoBlock JS tests

Several VideoBlock karma tests seem to be flakey.

By my estimate, one of any of these fails around 10% of the time.

1) player state was changed
     Video HTML5Video non-hls encoding on non-Touch devices  events: [play]
     Error: Timeout - Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL. in http://localhost:9876/absolute/home/runner/work/xblocks-core/xblocks-core/node_modules/jasmine-core/lib/jasmine-core/jasmine.js?da99c5b057693d025fad3d7685e1590600ca376d (line 3938)
QueueRunner.prototype.run/attemptAsync/timeoutId<@http://localhost:9876/absolute/home/runner/work/xblocks-core/xblocks-core/node_modules/jasmine-core/lib/jasmine-core/jasmine.js?da99c5b057693d025fad3d7685e1590600ca376d:3938:23
2) callback was called
     Video HTML5Video non-hls encoding on non-Touch devices  events: [play]
     Expected [ 3, 1 ] to contain -1.
../tests/js/html5_video_spec.js/</</describeInfo</</</</<@http://localhost:9876/base/public/js/commons.js?70e765de13f56a983143d5c15cc43f401e110fe8:65273:72
Deferred/then/</</<@http://localhost:9876/base/assets/js/src/vendor/jquery.js?26e6b63b81813d8ad942c90d369df2673602b812:3366:33
fire@http://localhost:9876/base/assets/js/src/vendor/jquery.js?26e6b63b81813d8ad942c90d369df2673602b812:3187:31
fireWith@http://localhost:9876/base/assets/js/src/vendor/jquery.js?26e6b63b81813d8ad942c90d369df2673602b812:3317:7     Error: Timeout - Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL. in http://localhost:9876/absolute/home/runner/work/xblocks-core/xblocks-core/node_modules/jasmine-core/lib/jasmine-core/jasmine.js?da99c5b057693d025fad3d7685e1590600ca376d (line 3938)
QueueRunner.prototype.run/attemptAsync/timeoutId<@http://localhost:9876/absolute/home/runner/work/xblocks-core/xblocks-core/node_modules/jasmine-core/lib/jasmine-core/jasmine.js?da99c5b057693d025fad3d7685e1590600ca376d:3938:23
3) callback was called
     Video HTML5Video hls encoding on non-Touch devices  events: [play]
     Error: Timeout - Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL. in http://localhost:9876/absolute/home/runner/work/xblocks-core/xblocks-core/node_modules/jasmine-core/lib/jasmine-core/jasmine.js?da99c5b057693d025fad3d7685e1590600ca376d (line 3938)
QueueRunner.prototype.run/attemptAsync/timeoutId<@http://localhost:9876/absolute/home/runner/work/xblocks-core/xblocks-core/node_modules/jasmine-core/lib/jasmine-core/jasmine.js?da99c5b057693d025fad3d7685e1590600ca376d:3938:23

Start with tests/js/html5_video_spec.js and run the VideoBlock Karma tests that cover HTML5Video HLS and non-HLS playback on non-Touch devices. Investigate the reported async timeout and callback results for the play event, then verify the affected tests pass consistently across repeated runs.