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  <xs:element id="glow_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpiredWeightedAverageExercisePrice" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpiredWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="glow_ClassOfWarrantOrRightIssued" abstract="false" name="ClassOfWarrantOrRightIssued" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="glow_StockIssuedConversionOfPreferredStock" abstract="false" name="StockIssuedConversionOfPreferredStock" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="glow_InventoryWriteDownNetOfInsuranceProceeds" abstract="false" name="InventoryWriteDownNetOfInsuranceProceeds" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="glow_ClassOfWarrantOrRightForfeited" abstract="false" name="ClassOfWarrantOrRightForfeited" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="glow_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriodNumberOfShares" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriodNumberOfShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="glow_ManagedServicesMember" abstract="true" name="ManagedServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="glow_AdjustmentsToAdditionalPaidInCapitalSharesWarrantIssued" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalSharesWarrantIssued" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="glow_OperatingLeaseLiabilityAdditions" abstract="false" name="OperatingLeaseLiabilityAdditions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="glow_NumberOfFacilities" abstract="false" name="NumberOfFacilities" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="glow_CollaborationProductsMember" abstract="true" name="CollaborationProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="glow_OperatingLeaseLiabilityImpairmentLoss" abstract="false" name="OperatingLeaseLiabilityImpairmentLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="glow_PreferredWarrantsMember" abstract="true" name="PreferredWarrantsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="glow_ClassOfWarrantOrRightGranted" abstract="false" name="ClassOfWarrantOrRightGranted" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="glow_ClassOfWarrantOrRightGrantedWeightedAverageExercisePrice" abstract="false" name="ClassOfWarrantOrRightGrantedWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="glow_OperatingLeaseLiabilityRollForward" abstract="true" name="OperatingLeaseLiabilityRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="glow_OperatingLeaseRightOfUseAssetRollForward" abstract="true" name="OperatingLeaseRightOfUseAssetRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="glow_AccruedSalesTaxesAndRegulatoryFees" abstract="false" name="AccruedSalesTaxesAndRegulatoryFees" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="glow_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsVestedInPeriodWeightedAverageExercisePrice" abstract="false" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsVestedInPeriodWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="glow_PrepaidSoftwareLicenses" abstract="false" name="PrepaidSoftwareLicenses" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="glow_ClassOfWarrantOrRightPercentageOfSecuritiesCalledByWarrantsOrRights" abstract="false" name="ClassOfWarrantOrRightPercentageOfSecuritiesCalledByWarrantsOrRights" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="glow_ForfeitureOfUnvestedStockOptions" abstract="false" name="ForfeitureOfUnvestedStockOptions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="glow_AdjustmentsToAdditionalPaidInCapitalSharesCommonStockExchangedForPrefundedWarrants" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalSharesCommonStockExchangedForPrefundedWarrants" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="glow_AssetsAndLiabilitiesLesseeTableTextBlock" abstract="false" name="AssetsAndLiabilitiesLesseeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="glow_ComputerEquipmentAndSoftwareMember" abstract="true" name="ComputerEquipmentAndSoftwareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="glow_OperatingLossCarryforwardsSubjectToExpiration" abstract="false" name="OperatingLossCarryforwardsSubjectToExpiration" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="glow_ImpairmentLongLivedAssetHeldForUseNetOfGainLossOnSale" abstract="false" name="ImpairmentLongLivedAssetHeldForUseNetOfGainLossOnSale" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="glow_TaxCreditReceivableCurrent" abstract="false" name="TaxCreditReceivableCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="glow_VideoCollaborationServiceMember" abstract="true" name="VideoCollaborationServiceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
</xs:schema>
